Researchers confirm a hypothesis that bird species that tend to sleep around aren't as cooperative as more monogamous species. Certain types of cooperative behavior are only stable in species that are not too promiscuous.

How is it possible to fly 11,000 kilometers without a single break? The record holder for long distance flight outdoes all human-made aircraft. The bar-tailed godwit has very low energy consumption, but this is not enough to explain its success.

Even tiny creatures can really push the boat out when trying to attract a mate. The Jumping Peacock Spider may be tiny, ...

Swifter Mops may not be as safe for pets as others may lead you to believe.

The attacks occurred in the village of Urakusa, in northeastern Peru, where the indigenous Aguajun tribe lives. At least four people are believed to have succumbed to rabies as a result. Medical supplies and vaccines to treat those infected with rabies have been sent to the tribe.

Humans are like the big fuel-guzzling SUV to the orangutan's slick hybrid.

In China, breeders say that adult Tibetan mastiffs typically sell for tens of thousands of dollars, with some going for more than $100,000. Last November, a couple forked over $600,000 for a purebred Tibetan mastiff called Yangtze River Number Two, and organized a fleet of twenty Mercedes-Benzes to bring the dog home.

Because of it's hydrophobic skin and notably small size, gecko can float on water and even walk on it.

Animal psychics are often the butt of jokes -- like in the upcoming film Dinner for Schmucks. But who else are you going to call when you need to track down your dead pet's reincarnation?

If you have more than one or two cats and are an astute observer of feline behavior, you've noticed that cats do seem to adhere to established feline social structures.