At first it was thought that sex between animals of different species was a case of mistaken identity, but new research suggests otherwise.
It's not just celebrities who know how to show off their assets.
Here are some of the animals--both on sea and on land--that existed during this mega-sized sharkâ€™s heyday.
Contest yields a stunning array of pictures of nature in action.
Members of the smallest penguin species may even synchronize their movements during foraging trips.
Foot bones more than 40 million years old, from Antarctica, reveal a creature standing more than 6 and a half feet tall.
Deadbeat-penguin dad abandons his incubation duties, and in step Jumbs and Kermit.
The latest version of the virus is unlike any other seen on Earth.
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