Which came first, the chicken or the egg?

Since there could be neither a chicken nor an egg without each already existing in a fully functional state, they both had to have been put in place at the same time. But there are many interdependent parts in the chicken system, and new research has uncovered one of the tiniest--yet most vital--of them.

When waters are murky, how do seals find fish? They don't have a sonar apparatus like whales, and yet they somehow hunt successfully in the dark.

What happens when two dolphins rapidly swim toward the same piece of food? Without some avoidance feature, bottlenose dolphins would become "bashed-nose" dolphins, or worse.

Fortunately, dolphins do have a solution--specialized communication. Where did this capability come from?

Partial remains of two skeletons were discovered in a cave in South Africa, and some scientists think they may be another addition to humanity's evolutionary tree.

Humans don’t need to learn the ability to move to a rhythm, according to a new study. They are born with it. Two researchers from Finland and the United Kingdom wanted to find out how soon in life people begin to dance to rhythms. They were surprised to find that babies as young as five months old match body motion to music.