TwistedSifter on MSN
What was the largest animal ever to walk in North America, and just how big was it?
Today, if you look across the land of North America, the biggest animal you are going to see is the bison. When you see it in ...
Millions of years after the last dinosaur roamed the earth, a new generation of killer animals rose to power. The Eocene, between 56-34 million years ago, was ruled not by killer reptiles but by a new ...
AZ Animals on MSN
How Anacondas Persisted While Other Giant Reptiles Went Extinct
Anacondas achieved their massive size millions of years ago. Discover how anacondas stayed huge while other giant reptiles died out!
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