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8ImtbHTX9gc • Cat Tales | Full Documentary | NOVA | PBS
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Kind: captions Language: en foreign [Music] of the world's most popular fairy pets who's a good kid famously enigmatic and totally unreadable we will often pretend to know what they're thinking or we write maybe not now biologists and archaeologists are unraveling their secret histories behavioral genes we have evolved a little bit to make a domestic cat more docile more friendly with humans molecular genetics is throwing new light on the cat's Journey from wild animal to furry friend we can really drill down and say definitively where domestic cats come from discoveries in Neuroscience are starting to explain why we find cats so appealing it's clear that these auditory sounds are plugging straight into our emotions Behavioral Science is giving us a hint of what they think of us they are able to differentiate between our different expressions and why they aren't always the ruthless Predator they sometimes pretend to be the cat likes to hide it likes to conceal itself it often likes to be up high where it feels safe what can science tell us about their future humans have hybridized the domestic cat with a completely different species we're on the prowl for cattails right now on Nova [Music] they are as enigmatic today as when they first came in from the wild cats leave fantastic devil lives they disappear for hours and we don't know where they go [Music] so yes cats are mysterious they are their best secret agents so where do these strange house guests come from they were slightly larger in size lived more in trees but otherwise they're going to have very similar characteristics that makes a cat a cat how did they end up living with us people have been speculating about it for hundreds of years and what about cat intelligence cats are brilliant people really underestimate the Brilliance of a cat do they even like us the right motivation for a lot of cats is not to please us or are they just in it for the treats the great big motivator is going to be food what is it about these strange creatures that makes them irresistible to so many of us [Music] thank you [Music] welcome to Las Vegas for the 40th Tikka cat show one of the largest feline shows in the USA we have 447 cats and we have 247 exhibitors it is a testament to our fascination with cats poppy is a Canadian Sphinx they're a very sweet breed they call them velcro kitties because they like to be on your lap all the time a tiger I invented it he has a fantastic temperament cats are popular because they are simply very charismatic they're independent and they're considered easy Keepers it's nice being able to come home relax have your cat come up to you meow sit in your lap and purr it just makes you feel loved and welcome there are over 70 breeds recognized by the international cat Association these are white Oriental short hair which is a Siamese and a designer coat yeah he's a sweet boy then there are glamor cats like the Persian with its thick luxurious coat the Maine large smart and a deadly Hunter and the Exotic one of the most popular breeds in the U.S and that's just a start you can get small cats you can't get large cats you can get cats for shortened legs you can get cats with folded ears we estimate about one out of five households in the U.S owns a cat one thing is clear owners really love their cats [Music] are perfect for me because I just love their companionship they jump up on your lap and that's all I need just a little cup of tea and a cat [Music] why are so many people obsessed with cats the latest scientific research suggests owners literally can't help themselves Professor Morton kringlebach works at the University of Oxford he studies hedonia pleasure pleasure is probably one of the most interesting tricks that Evolution ever played on us it's basically making us do what it is that we need to do to survive to understand how humans experience pleasure kringlebach uses a magnetoencephalograph or Meg to map and measure electrical activity in our brains in real time what is really exciting about this technique is that it allows us to basically look at how the brain is thinking how the brain is having emotions you can measure over milliseconds the way that the electromagnetic signals in your brain changes and we can start to see how the brain is unfolding in real time the brain fires electrical signals between neurons each tiny electric current produces a minute magnetic field but these magnetic fields are so small they can be swamped by interference from electronic equipment even from the magnetic field of the Earth for the Meg to measure brain activity test subjects must be locked away in a heavily shielded room okay we're just about ready to start just sit nice and still and just listen to The Sounds in previous trials kringlebox team tracked the brain's responses to the sound of a newborn baby [Music] so what we're seeing here is how the signal gets into the auditory cortex this bit here and here so it's basically just near to your ears and you can see that after about 130 milliseconds you get the maximal response now when you're listening to an infant crying you also get activity in the orbital frontal cortex and that's happening at exactly the same time as when you are actually trying to make sense of what it is that you're hearing the orbital frontal cortex is Central to processing emotions and the experiments suggested that the sound of a baby crying triggered a response there before the subjects had consciously identified the sound [Music] it seems to be an instinctive emotional reaction that may not even require rational thought this may be because the need to care for infants is an essential species survival skill it's clear that these auditory sounds are plugging straight into our emotions in tests where subjects listen to the sound of an adult crying a much weaker response arose in the orbital frontal cortex suggesting only certain sounds trigger a strong emotional response [Music] but there was another sound that produced the same reaction as a baby's cry a cat's meow [Music] there seems to be striking similarities between the way that we process a cat meowing and that of baby crying we get activity in the auditory cortices looks like we do with anything else but before we become conscious of it we get activity in the orbital frontal cortex suggesting that this is something that we need to take care of the fact that a newborn's cry and a cat's meow initiated the same emotional response could have been a coincidence except for one thing yowing in adult cats is really interesting because it turns out that they only really do it to humans when cats meow to us it's as if they are hijacking our emotional responses to make us love and care for them but are they doing it on purpose it's not necessarily something that is conscious it's just that they know that this works just like we know that smiling and our parents worked when we were kids [Music] monster they probably don't mean to manipulate us but they do so we have some idea of what's going on in our heads about cats but will we ever know what's going on in their heads I definitely think cats are more aloof than dogs I do think that they can be very emotionally distant we will often pretend to know what they're thinking or we write maybe not but it's fun to imagine [Music] cats are famously enigmatic so it's tough to figure out what they're feeling by looking at their faces happy cat angry cat or is that the sad cat [Music] we may not be able to figure out what our cats are feeling but can science shed any light on it historically cats aren't seen as very expressive so there is that idea that they are particularly cold when it comes to interacting with us compare that to a dog whose face seems full of expression empathy happiness sadness guilt why aren't cats as communicative they're not really able to frown or have that sad sort of puppy dog eye expression they don't seem to have the right musculature for that both dogs and humans have a muscle that is responsible for raising the inner eyebrow which we use for showing things like sadness and concern cats don't have this muscle so cats are physically incapable of having faces as expressive as dogs however finka's research suggests that cats can communicate some emotion on their faces it's just we don't speak their language so we know that the muscles of the cat's face are quite different from other species and certainly from humans they use the muscles in different ways and they also have different types of muscles and different collections of muscles will do different things finger studies how cats faces change when illness or injury produces pain this is the only feeling she can currently say with confidence that a cat is experiencing we are looking at cats when they come into the Vets with a painful condition and we do know that they're actually changing their expressions in relation to how they're feeling and if they're in pain she has identified a set of incredibly subtle markers to help track their feelings we have a series of 48 facial coordinates and we can actually look to see how these coordinates are altering based on what the cat's experiencing so whether they're in pain or not in pain or whether they're relaxed and comfortable or perhaps fearful or frustrated finger has identified some telltale signs such as a cat's ears turning very slightly outwards and down or a tiny reduction in the distance between the cheeks mouth and nose region these are all signs that the cat is not happy and in pain but if you think this is going to usher in a new age of cat human communication think again it's very very subtle so statistically it's significant but in terms of the average cat owner trying to look at their cat's face it might be a little bit more problematic our struggle to read cats feelings isn't going to get much easier anytime soon but can cats read our emotions any better to find out researchers conducted a series of Behavioral tests doesn't mean that they don't necessarily have the same level of skills and abilities it just means that it's much harder for us to find the right context to test them in and get them to play ball in the way that we need them to pepper the cat has been placed in a room with her Handler who makes various faces at her first up scowling can pepper detect this is a negative emotion it appears cats are less likely to react positively to someone they know if they have an angry expression next a positive smiling face by running the test multiple times scientists gathered results suggesting that a cat may be more likely to approach someone they recognize if they are smiling at it what the research suggests is that they are able to differentiate between our different expressions and they're using this information to change the way that they are responding The Limited study also suggested that cats react more strongly to both the positive and negative emotions of their owners than to those of strangers the behavior of owners is much more important to the cats because we're the ones that feed the cats and we look after them so maybe they're more interested in paying attention to us for that reason we may struggle to read cat faces but we're probably less inscrutable to them so what led to this unlikely partnership between human and Cat to answer that it helps to understand their Origins domestic cats are part of a much larger and Wilder family a family with some very big Footprints to fill the lion the tiger the leopard Predators at the top of their food chains but whatever the apparent similarity these are not our cats direct ancestors all felines or felids evolved from the pro-illurus an animal living in Eurasia roughly 25 million years ago these felids were probably slightly larger in size lived more in trees than our domestic cats do but otherwise it's going to have the same teeth and Claws just like a domestic cat does so all cats whether you're a lion a tiger or a little domestic cat sitting on your lap they're going to have very similar characteristics that makes a cat a cat DNA and fossil evidence tells us that big cats the lion the tiger the Jaguar separated from the common ancestor around 10.8 million years ago large American cats like the lynx and Bobcat separated 7.2 million years ago the domestic cats ancestor the most recent branch of the felid tree established itself 3.4 million years ago felis sylvestress the Wildcat it's a much smaller subspecies of feline that relies more on surprise and stealth than Brute Force this explains the origins of some of the Strange Behaviors owners see in their pets there are several clues in cat's behavior that they're perhaps not the apex predators and in fact are prey as well as Predators for example the cat likes to hide it likes to conceal itself it often likes to be up high where it feels safe and where it can be very vigilant according to genetic research Felix Sylvester split into five distinct subspecies the European Wildcat the Chinese Mountain Cat the Southern and North African Wildcats and the Central Asian Wildcat but which one is the actual ancestor of our domestic cat people have been speculating about it for hundreds of years where they came from whether or not they came from many different species or many different subspecies of one species in 2007 geneticist Carlos Driscoll started a groundbreaking study collecting DNA samples from Wildcats and comparing their DNA to domestic cats with the Advent of molecular genetic techniques we can really drill down and say definitively where domestic cats come from subset of Felix sylvestress has a distinct DNA signature made up by different combinations of the four chemical bases A T C and G by comparing these to the domestic cat Driscoll was able to pinpoint which subspecies was its ancestor domestic cats are derived from one single group of felous Sylvester's in the wild Felix Sylvester's libica [Music] the North African wildcat a solitary animal found throughout Northern Africa and the Middle East longer legged than our domestic cats with a coat that ranges from reddish to gray to camouflage in different habitats but when did this Wildcat become our domestic companion in 2004 on the small Mediterranean island of Cyprus archaeologists found evidence of the earliest known encounter between cat and human a team led by Jean deniving was Excavating a 9 500 year old human settlement during the excavation they discovered a grave a grave that had two occupants the skeletal remains of a man and a cat a felis Sylvester stallivica it was amazing to find a complete animal and especially a cat beside a human and it was so early that it was really surprising to have such an Evidence of connection between one cat and one human the way the bones were laid out suggested that the cat had been intentionally placed next to the man they were facing each other in death in the afterlife and this is a scene which has been arranged by people but what really caught scientists interest was the fact that Cyprus is an island and no Trace has ever been found of native Wildcats so how did this cat get here the fact that this burial was found on Cyprus means that somebody brought these cats to the island by boat the Cypress settlement closely matches sites found in Turkey so archaeologists believe that's where the settlers originated and where we know that Felix Sylvester's libika was common it suggests these people or their ancestors must have brought a cat with them but the Cypress cat was different from Mainland Wildcats in one very significant respect this cat was very big this meant that probably it has been fed so maybe it was more or less a pet a larger skeleton indicates that the cat is domesticated because he's getting enough nutrition that he can devote all that energy obtained from food into growth cats in the wild are less able to spare the energy to grow big there's a Time cost to hunting so you would have energy diverted into fueling your hunts then therefore you'll be smaller on its own the evidence of the Cypress cat is not enough to confirm that this nine and a half thousand year old cat was domesticated but there's now evidence from genetic research that supports this Theory to date the split between Wildcats and domestic cats scientists use mitochondrial DNA unlike other DNA mitochondrial material comes almost exclusively from the mother so it's passed down the generations unaltered except for random mutations that happen at a known rate by calculating that rate of mutation we can actually calculate the age of a specimen that we're studying so we use the mitochondrial clock a lot with different organisms to try to figure out their age in evolutionary time and it shows that our domestic cats split from Wildcats approximately 10 000 years ago very close to the time of the Cypress cat why did it happen then well at that moment in history human societies were also going through a big transformation becoming farmers this started in an area of the near East archaeologists call the Fertile Crescent turkey with the Cyprus cat originated was part of it the Fertile Crescent was so rich an area for hunting and Gathering that people could have little encampments that eventually grew into towns so throughout all seasons they could be in one spot this new way of life relied not only on the ability to grow food but also to store it what's the dawn of civilization got to do with cat domestication humans by this point were harvesting grains and caching them putting big stores of grains in baskets in holes in the floors of their houses but the Grain Stores were an easy target for Hungry wild rodents they had the potential to devour these new food stores luckily for our ancestors this new concentration of rodents attracted something else something Wild cats were likely drawn into these new human settlements because they could hear something we couldn't cat hearing is really just truly amazing so they can actually hear very low frequencies and very high frequencies and of course much of their prey is squeaking at high frequencies humans can't hear some rodent squeaks at all as they vocalize at a frequency beyond our hearing range but cats have ultrasonic hearing when we hear nothing they hear this the pitch of these squeaks must be lowered by 90 percent to make them audible to humans [Music] cats also have unique anatomical gifts that help them zero in on their next meal the outside of their ear has an amazing amount of muscles in it so they can turn their ear all the way around that allows the cat to really hone in on where the mice are rats are where they're communicating and hence they're going to capture them for their meals this makes cats rodent Terminators Unstoppable killers the Allure of easy pickings in the first human settlements namely rodents would have been irresistible and you'd be forgiven for thinking that cats still like to show off this prowess ten thousand years later she brings us gifts maybe once a month we have a mouse appear in the house it is a bit disgusting we get leaves leaves yeah they brought a leaf in and Rita brought a piece of stale toast in once from the back Garden so lots of people think that their pet cats bring them gifts in the form of small rodents or Birds but actual fact the cat doesn't believe it as a gift the cat will often bring home the prey that it is caught because the home represents the core territory to the cat the place that it feels safe but ten thousand years ago this would have been very effective PR proving to our ancestors that cats protected valuable food resources this was a creature you'd want to have hanging around maybe you set out some food for a cat to keep it around your house you might have done that because you thought it was eating mice and keeping your Grain Stores clean the domestic cats split around 10 000 years ago in the near East but how much have they changed from their wild ancestors the wildcat in the wild feeds only on meat they're obligate carnivores or hyper carnivores so they can only process proteins they're metabolically incapable of digesting carbohydrates house cats are different while wild cats only eat meat their domestic cousins have evolved the ability to digest some plant matter the domestic cat for thousands of years now has been living off of scraps not just scraps of meat but also scraps of grains and vegetables and the result of that is that domestic cats have a slightly longer intestinal length than their wild ancestor and Darwin hypothesized that this is because the cats are trying to squeeze as much nutrients out of this poor food as they can this irresistible combination of rodents and edible human refuse could explain why the Wildcat decided to come in from the wild and live alongside humans [Music] Wildcats genetically predisposed to find humans less scary would have hung around the settlements anything that has to do with aggression or boldness are probably genes that are involved with the actual domestication process because those had to change between the wild progenitor and the domestic cat in order for the cat to cohabitate with humans breeding between these animals would have positively selected genes that allowed them to live more closely with humans certainly there have been some genes that have changed between an African wild cat and the domestic cat itself because we know the behaviors are different behavioral genes which are genes that are involved with our brain and our neurology those are genes that have evolved a little bit to make a domestic cat more docile more friendly with humans geneticists have found 13 genes that have changed in the domestic cat compared to its wild ancestor genes like DCC and gria1 which are associated with making cats friendlier and less afraid of people we may never know who initiated first Contact but it's safe to assume that cats determine the terms of the relationship so it's not a stretch to say that we didn't domesticate the cat the cat domesticated itself [Music] genetics has confirmed that domestic cats originated in the Fertile Crescent but it's also revealed something genuinely surprising one country had more influence on the genes of modern cats than any other and it was a long way from Turkey [Music] besser salima ikram is an expert in all things Egyptian including their obsession with cats ancient Egyptians really loved animals but they also revered them cats were perhaps the most popular and the most highly venerated because of their utilitarian as well as metaphysical values in Egypt four thousand years ago the first images of cats start appearing wall carvings and paintings of cats living with humans Egyptians especially valued the cat's Killer Instincts ancient texts tell us that not only did cats kill rodents but they also killed snakes so of course Egyptians loved this because they were much safer as a result imagine if you're a mother and your child is crawling around and then a snake approaches and your pet cat kills it also for them the idea that a cat was killing a snake meant that the Sun God Ra was killing the evil snake Apophis so it was sort of doing double duty this Mystic battle playing out in homes across Egypt would have done wonders for the cat's PR the cat became so important to Egyptians that they turned it into a goddess The Cult of bastet the Cat Goddess had always been popular in Egypt but it really came to prominent 3000 years ago about 500 600 BC bastet the daughter of RA would often take the form of a cat bastet was very much about self-indulgence and beauty and love and fertility which was very important unfortunately for cats being worshiped as a goddess had a very unfortunate downside we're about to go into the tomb of Raya who is a new kingdom official it's a really ancient tomb and it's not been open to the public for ages [Music] nice [Music] they lived about three and a half thousand years ago just at the beginning of the time of Tutankhamun but that's not the most interesting thing for me about this too for me the most exciting thing is actually that it was reused to bury captain this tomb is packed with cat mummies the downside of being worshiped as a goddess was that it led to cat's sacrifice on a huge scale pilgrims would buy these cats to give a blood sacrifice and so for the Cat Goddess bastet you would offer up a cat which would then be killed and because it was her titular animal it would attract her attention in the afterlife the demand for sacrificial cats became so great Egyptians were breeding hundreds of thousands of them people were breeding these animals specifically for sacrifice so we think that there might have been catteries scattered all over the country where purpose-bred cats were being given to the temples for the priests to sacrifice this breeding program was so intensive it may have changed the physical appearance of some cats yeah yeah little poor it's part of the four leg of the cat but what's extraordinary is that you can still see some of the fur here and it's a ginger Kitty and a lot of the cats and paintings are ginger cats they were favored because they brought out the idea of the sun guard ra and you can see this color here seeing a ginger or orange cat today isn't unusual but four thousand years ago before the Egyptian breeding program nearly every cat in the world looked like this tabby the striped pattern which is the mackerel tabby was the original wild type version of a cat's coat the mackerel pattern helps it to have better camouflage in the environment that it has evolved in orange coloring isn't good for camouflage these cats would have been less well adapted to the wild but in the categories of Egypt there was no need for camouflage in the wild these new coat color patterns wouldn't be tolerated they don't provide any advantage but when you're around humans they become selected by humans because they're odd and different it's called novelty selection so when we see these odd colorations showing up in a species that is a clear sign of domestication the orange mutation may not have occurred first in Egypt but it was certainly established and protected here so if it wasn't for the Egyptians we may not have orange cats at all the Intensive Egyptian breeding program didn't just change the way cats looked it changed their behavior as well it's absolutely changing the cat's personality making it more domesticated by putting these cats into large groups after generations of selecting for cats that go from a solitary animal to being a group species now you're probably changing the cat's Behavior to be a less stressed animal a more bold and loving animal with humans so Egyptians produced cats that were more attractive to humans this could explain why the DNA of Egyptian cats makes up so much of a modern cat's DNA compared with cats from Elsewhere for any given species not all lineages are going to survive so for the domestic cat the Egyptian lineage of cats really dominated and was more popular and so probably out-competed the other different lineages that were from different places of the world but how did cats bred in Egypt spread across the world the same way many invading forces did at the time by boat Egypt was a major trading Hub in the ancient world precious metals gems and Timber came in Grain from the fertile Nile went out and much of that trade went by sea because the trade ships were filled with grain primarily there were so many rats about that of course cats were really welcome because they not only protected the grain but they also protected the sailors from being bitten and also their own food so cats were really stars on these boats cats began traveling the Known World on ships for thousands of years Egyptian and Roman then Viking ships transported cats across the world Vikings in particular seem to have favored the unusual color mutation that had originated in Egypt you can almost map where Vikings were by looking at the gene frequency of orange in Europe Vikings clearly couldn't get enough of their orange Egyptian cats [Music] it was probably true in Viking society as it is true in most other early seafaring societies that having a cat on board a ship was good luck and it could be that the Vikings selected orange cats to bring on their boats for some reason that we don't know Egyptian cat genes conquered the known world but it seems not everyone was happy about that because by the Middle Ages in Europe cats weren't being worshiped they were being persecuted mainly thanks to this man Pope Gregory IX this 13th century pope produced a Papal anti-cat edict it accused cats of being in League with Satan and because what the pope said was the word of God God hated cats the solution to the satanic cat Menace was simple and straightforward Kill Them All in late medieval Europe there were festivals formed around the torturing and killing of cats and of course when tortured they made to sadists of a satisfying amount of racket [Applause] so what was it about these relatively harmless furry creatures that was so alarming to Medieval Society cats are creepy creatures to a lot of human beings so there's always this tension between an animal that actually shouldn't be in your home and as a predator of quite menacing and yet she is affectionate and cuddly and Purry and furry and warm another reason medieval people could have found cats disturbing was because of their serpent-like eyes cats have unique adaptations in their eyes that allow them to be superb Hunters at night one of these adaptations is the reflective layer in the back of the eye called the tapedum light entering the eye is picked up by the photoreceptors in the retina it hits the tapedum lucidum reflects back and gets picked up by the photoreceptors again this adaptation helps give a cat six times greater night vision Acuity than a human however this membrane makes the cat's eyes appear to glow in the dark not ideal in the age of Witchcraft and superstition we are a diurnal species we're suited to Daylight we can't see in the dark the night for us is disempowering scary and positively dangerous whereas to a cat it is simply a natural environment isn't it Moses by the end of the Middle Ages cats had colonized almost every continent on the planet and they had started to diverge further and further from their near East Origins one of the more famous and striking of these new cats was the Siamese Siamese cats are very interesting because they're sort of a natural breed that occurred in Thailand the Siamese evolved in a different direction from its Egyptian ancestors losing the Tabby coloration completely opting for something totally unique so this beautiful girl has got a classic Siamese coat color with the the Browner ears and nose and tail and feet and that's the result of a thermosensitive mutation in a tyrosine gene that inhibits the production of melanin on these cats and so the warm parts of her body lose the color and the cooler parts keep it the DNA of the Siamese show they separated from the Mediterranean breed centuries ago and evolved independently on the other side of the world it's not believed that anybody set out to breed these cats what happened is a mutation occurred and it stayed in this very small isolated population in Thailand and from there it drifted into fixation in a certain number of cats this process is called genetic drift it occurs when a particular mutation becomes accidentally dominant in an isolated population that doesn't mix much with the rest of the world if a mutation occurs in a small population it's got a very good chance of drifting to fixation which means that a hundred percent of the cats in that population will then have that mutation the Siamese is an extremely unusual breed because its looks result from a natural genetic process most cats in the world arose by more artificial means a sudden and huge expansion of cat breeding during the late 1800s and into the 1900s and on cats have become a status symbol Europeans realized that there were different variety of cats from all around the world they then Incorporated that into their breeding programs people started selecting cats because they had unique varieties the Angora cat came from the near East the Abyssinian came from Ethiopia the Manx cat which had no tail came from the Isle of Man and this new trend of cat breeding was enthusiastically taken up in the U.S in short order one on the first is the Maine the natural long hair cat that really actually came over with the pilgrims but now was indigenous to the United States another very interesting cat breed that developed in the United States is the Ragdoll this cat developed from cats that were in California breeding both natural and human assisted has given cat owners an astonishing level of choice so you might think that after ten thousand years and all this effort we've bred out their Wild Side apparently not these are feral cats they are not wild animals despite how it may look these cats or their close relatives were once normal house pets take a domestic cat out of the home and they can turn a lot less loving Barrel cats typically will start up with fight or flight when people come into play this suggests all domestic cats have this wildness within them so why don't they all turn feral the socialization window for cats is very important if you want a friendly cat a cat that is accepting of people and new experiences this is usually between two to seven or eight weeks of age if they miss that window it's more likely to have a cat that's more sphereful and more what we consider referral U.S cities like Atlanta have a serious problem with feral cats we don't want to euthanize the cat because you know what happens when you remove cats from the outdoor environment is that new cats come in so we actually maintain a stable population so we don't add more cats into that area so veterinarians like Dr Ashley Randall work on programs to try and control the situation neutering and spaying is really really important when it comes to feral populations especially if we're trying to control the numbers anytime a population gets really really high you run the risk for disease and that's for people and for pets helping Dr Randall with Atlanta's feral cat problem are Lizzy and cassia from the pets for Life program we are out today doing some cat trapping for what's called TNR trap neuter release a female cat will have kittens every two months and she will be impregnable right after she delivers so pretty much you can assume that every female cat in the wild out here is pregnant at all times Lizzie and cassia are tracking a feral cat active in the area so they've left a series of traps filled with food it looks like somebody's in there yeah hi there see what we've got hi looks like the right one we're gonna take you to the vet let's get them in the van okay on average they catch 15 cats a week okay Buddy each one receives a welcome health check vaccinations and neutering or spaying okay so his heart sounds good and his gums are nice and pink very good big guy all right so we are going to put him on his side and then we are going to give him his sedative [Music] all right all we're doing is taking away the reproductive organs so we're taking away organs that they can live without very easily for males they're up within about 20 minutes of that procedure so he's gonna go back outside and live out his life all right big boy the whole procedure takes less than 10 minutes and a few hours later the cat is released back onto the streets it's okay buddy we're home the reason we trap neuter and return feral cats versus keeping them and adopting them out is they're truly not happy to live inside with people this way the vet said he was pretty healthy surgery went well so he might be a little drowsy this evening and then he'll be back to full energy tomorrow ready to Take On The World there you go so domestication may only be skin deep and cats are essentially still wild animals wild animals that now live with us this essential wildness may explain in part why cats are not trainable in the way dogs are dogs want to please their owners they are what is known as hypersocial cats don't really care what their owners want it's a lot more difficult to train a cat compared to a dog because dogs are specifically selective for their trainability whereas cats have shorter attention spans and people also really don't spend a lot of time training cats but just because they aren't as Cooperative as dogs doesn't mean they aren't as smart or trainable you just have to make it worth their while Meet Samantha Martin this is meowy Manor [Music] Samantha is the manager of a traveling troop or more accurately pride of Performing cats most of the training happens in here [Music] cats are brilliant people really underestimate their Brilliance of a cat by training them they get to use their brain they have to figure out what it is that I want from them to train her cats Samantha uses a method called operant conditioning also known as clicker training this is the target stick so he was trying to jump up to wherever I pointed the target stick and once he had all four paws up on the barrel I'd just click and treat the clicker acts as a bridge or a marker to let the cat know that they've just done a behavior that's going to give them a reward God once the behavior is learned I no longer need the target stick or the clicker just the prop itself and they know what to do with the prop foreign [Music] the question is are the cats training to please their owner or are they just there for the food if you want to train a cat the great big motivator is going to be food food is a primary reinforcer it's something that they can't live without so most cats can be trained to work for that food compared to dogs there hasn't been much research into cat cognition and intelligence but cats are clearly clever when they choose to be the acro cats played to full houses as they tour the USA audiences crammed with envious cat owners wondering why their pet won't do this experience and hard work says reward with food and you might have a little more luck [Music] so where next for our wild feline friends well some people have plans to completely reinvent the cat all domestic cats up until the last 20 years have been purely Fearless Sylvester's humans have very interestingly now hybridized the domestic cat with a completely different species Anthony Hutcherson has been breeding one such hybrid the Bengal cat Bengals come from a cross between domestic cats and a wild cat species called the Asian leopard cat personality wise they are a little different from other cats and they're pretty active and interested and intelligent so if you just want a cat to sit on your lap this is not the gap for you [Music] the difference between a domestic cat and an Asian leopard cat is about six million years of evolutionary time that's on the same range as the difference between a human and a chimpanzee with such a huge evolutionary difference can these new hybrid cats still share our homes [Music] everybody the challenge lies in getting those physical traits that attract your eye and have excited Humanity since the beginning of time without those traits you don't want on the inside getting scared easily peeing in the corners you know needing to eat a lot of raw bloody meat the Bengal is not the only exotic breed trying to inject a wild look into cats the chaucy is a cross between a domestic cat and another non-felous Sylvester the jungle cat and the Savannah is a cross between a domestic cat and a serval a cat that broke away from the Wildcats line over eight and a half million years ago I think these cats are both the future and the past of domestic cats they represent the thing that people love and want as a bit of the wild in their house which is kind of the oldest reason people love cats anyway ten thousand years ago our first feline furry house guests moved in since then they've traveled the world been feared by popes and worshiped like Gods they've hijacked human instincts for their benefit apparently learn to read human emotions but kept their own feelings Under Wraps they can even entertain us as long as we make it worth their while and though they've gone through subtle genetic changes their wild Nature has endured despite our best efforts what's more they've leveraged some of those traits to become the ultimate consumer pet bringing a little bit of the wild into millions of homes and what do cats make of all of this as usual they're not saying foreign [Music] to order this program on DVD visit shop PBS or call 1-800 play PBS episodes of Nova are available with passport Nova is also available on Amazon Prime video [Music] thank you [Music] [Applause] [Music] thank you