Kind: captions Language: en the Arctic the Internet our planets ice world's fast frozen and empty get hidden in these rocks buried under the oceans and trapped in the ice our clues that revealed but totally different past is full of surprises I'm Kirk Johnson and I'm headed out on an adventure back in time just walking around carrying a mammoth tusk and around the globe from one polar extreme to the other discovered earth totally different it just looks like Mars the planet we know today this place is so totally amazing an Arctic that was once a warm humid swamp Antarctica full of dinosaurs in a time when ice sheets extended from pole to pole turning earth into a giant snowball what powerful forces Grove the poles to such extremes and what does it mean for our planets future find out the true power of ice it's an amazing I'm here polar extremes on Nova