Eggshells found to be an excellent source of DNA, which until now researchers thought could only be extracted from bones.

Scientists discover that hermaphrochickens exist because of cellular differences -- not because of hormonal influences.

New exhibit at the National History Museum of Los Angeles will explore evolution and environmental change.

Morieka Johnson knows a few tricks for keeping your older pooch happy and active.

Why are California sea lions getting sick with cancer? Researchers suspect viruses, PCBs in the water and genetics.

These are the countries where the most endangered species are at risk.

Erstwhile newspaper executive reports on his three-day, 37-mile trek. Did he see bears? Yes, but ...

Scientists are beginning to unravel the mystery of how caddisfly silk stays sticky underwater, and it could lead to the development of a wet Band-Aid.

Discovery Channel series gives you an up-close look at the thrilling action of the natural world.

Scientist accidentally discovers a strong response in mice brains to combinations of smell and hearing.