Prehistoric New York (02:11)
Prowling New Jersey's Meadowlands 220 million years ago was the fearsome Postosuchus that hunted like a crocodile on speed.
Prehistoric New York (02:56)
Near the end of the Ice Age, one of the largest rodents of all time, the giant beaver Castoroides, has overrun the New York area.
Prehistoric New York (02:59)
100 million years ago, New York is submerged beneath a tropical sea and the giant turtle Archelon rules the waves.
Prehistoric New York (03:10)
Huge American mastodons loved to roam the bogs and wetlands of ancient New York and New Jersey.
Valley of the T-Rex (50:02)
In the badlands of Montana, paleontologist Jack Horner found five T-Rex dinosaurs in a single summer, exposing clues to a lost world.
Dinos (01:54)
A lot can happen at the base camp of a dinosaur dig, including saving a bird's life. James Williams gets the scoop.
Dinos (02:10)
Flip a genetic switch and turn a bird into a dino? Not quite, but not so far off either. James Williams gets the story from paleontologist Jack Horner.
Dinos (02:48)
For the first time ever, paleontologists are chemically analyzing dinosaur fossils the same day they're excavated from the ground. Kasey-Dee Gardner finds out why this new technique is so important.
Dinosaurs (00:59)
A paleontologists explains why the T.Rex became so adept at killing.ATTENTION! We recently updated our privacy policy. The changes are effective as of October 30, 2008. To see the new policy, click here.
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