Kind: captions
Language: en
a gigantic asteroid 6 m in diameter
collided violently with
Earth forests burned and volcanic ash
soon filled the skies blocking out the
sun this was an Extreme Survival
situation one that 75% of Earth's
species weren't ready for among the
mammals the smallest some weighing less
than one PB managed to escape the
catastrophe as well as some reptiles
like turtles and crocodiles
birds were also hit hard only the
smallest such as AER arus survive the
chaos how is it that all but one group
of birds were wiped out what did they
have that no other archaic bird and no
other dinosaur
had genvis is a bird that did not make
it its fossil dates back 67 million
years to a time just before the asteroid
hit close analysis is helping us to
better understand the reasons for its
disappearance here you can see the
skeleton of JIS we have some of the
bones particularly the arm bones and
part of the vertebral
column equipped with teeth genevas has
an imposing stature is this why it
didn't survive the asteroid
strike the key difference between
genevas and aoris is size aoris is much
smaller a trait that was key to its surv
survival post asteroid
strike so larger bodied animals through
this mass extinction event didn't do
very well at all so a really big bird
like Jan AIS probably would have been at
a major disadvantage compared to Aster
Oris after the extinction event getting
a meal for an animal the size of Jan AIS
probably would not have been a very easy
thing to do they also had very different
ecologies that's true JIS was basically
a seab Bel like we will have been
fishing and eating fish and Squid aoris
was more like a generalist ground
dwelling bird eating whatever he found
in the pits with the trees gone a large
number of tree dwelling Birds could not
survive instead it was Ground Dwellers
like aorus that held the
advantage archaic Birds although more
numerous were devastated by the asteroid
their ecosystems were destroyed in this
hostile environment their imposing size
life in the trees and specialized diets
led to their
Extinction only modern ground nesting
birds with more flexible diets were
resilient enough to survive a decimated
landscape