Animals

Researchers tracked more than 200 bull sharks off the coast of New South Wales to find out exactly when they were most active and posed the greatest risk to humans.

Lampreys belong to an ancient group of fish called Agnatha that evolved 450 million years ago, predating both dinosaurs and trees.

A new study has found that the famous Australian lungfish Methuselah, who first arrived in the U.S. in 1938, could be up to 101 years old.

The seven-arm octopus, which actually has eight arms, is one of the largest octopus species and is rarely seen by people because it normally dwells in the deep sea.

Anglers in Texas reeled in a 283-pound alligator gar after a lengthy battle with the enormous fish. Experts say the catch likely breaks a 72-year record.

Crocodiles appeared to rescue a dog that had been chased into a river, and scientists said this unusual behavior could indicate empathy — but others are skeptical.

A snake in France had a lucky escape after attempting to eat a fish with a spiny dorsal fin that had gotten lodged into the reptile's esophagus.

Placozoans, animals so simple they look like blobby pancakes, have been found to contain cells that may hold the ancestors of modern neurons.

Researchers analyzed RNA from the 130-year-old tissue of a Tasmanian tiger, a carnivorous marsupial that went extinct nine decades ago.

Researchers have discovered that hundreds of great white sharks that vanished from their home off the Western Cape of South Africa have moved east in order to survive — but this could spell trouble for both the sharks and the people living there.