Animals

When your dog's big, pleading eyes look up at you, is it with old-age wisdom or teenage naiveté?

A pair of mated male penguins in a Dutch zoo were so eager for offspring that they stole an egg from another couple's nest.

They likely had to swim about four miles to the island.

The puppy appears to have an extra tail on his face, but things are not what they seem.

A previously unknown species of primitive bird has a tail feature associated with flight in modern birds.

Gigantopithecus, an enormous extinct ape that lived in Asia millions of years ago, was a close relative of the modern orangutan.

Scientists reveal more mysteries about the bizarre Tully Monster, an ancient sea creature with stalked eyes that has defied classification.

Scientists used a computer program to uncover more than 1 million molecules that could potentially store genetic information, just like DNA.

With a series of camera traps, researchers have caught the silver-backed chevrotain meandering about its tree-filled home.

Paleontologists in Poland unearthed the jaws and teeth of a pliosaur, an ancient marine reptile with a bite more powerful than that of T. rex.

A fungal disease is infecting snakes across the nation, and now, it's reached California.

After a group of worker ants became trapped in a sealed nuclear bunker in Poland, they formed a queen-free "colony" that survived through cannibalism.

Cats that have an extreme response to catnip may look like they're experiencing euphoria.

A trio of divers off the western coast of Norway had a close encounter with a drifting gelatinous blob — a squid's egg sac as big as an adult human.

Gooey, sticky slime isn't just gross; it's crucial for the survival of a wide variety of animals and plants, many of which are featured in the new book "Believe It or Snot."

The Paris Zoological Park is debuting a new exhibit on 'the blob' — a brainless, single-cell slime mold with incredible problem-solving potential.

Head-bobbing might make pigeons look ridiculous, but there's a practical purpose behind this very strange display.

Trilobites fossilized in Morocco seem to have been buried by a storm as they marched in an orderly queue.