March 30, 2001 • 52m
For the first time ever, scientists believe they have gathered substantial evidence that points to a single animal group of creatu...Read more
January 1, 1970 • 52m
When we think of animals, we think of movement. Surprisingly, the diverse and graceful ballet of animal movement may have started ...Read more
January 1, 1970 • 52m
The best way to find food is to go out and hunt for it. But to hunt, you need to be able to move forward. And to move forward, you...Read more
January 1, 1970 • 52m
For hundreds of millions of years, animal life resided only in the oceans. And then about 400 million years ago, fossil tracks sug...Read more
January 1, 1970 • 52m
Behind the beautiful shapes and colors of seashells is the story of how a group of animals called molluscs evolved in order to sur...Read more
January 1, 1970 • 52m
It's easy to believe that animals like us, creatures with heads, eyes, and brains, are the crowning achievement of evolution. But ...Read more
January 1, 1970 • 52m
In the 4.5 billion year history of Earth, a mere 10 million years seems rather insignificant, the equivalent of two months in the ...Read more
January 1, 1970 • 52m
As we go through our lives — driving cars, exploring the Internet, studying the world around us — it is hard to imagine that we're...Read more