Although bigger animals usually have bigger brains, this isn't a perfect measure of their intelligence.
Many Pokémon designs are inspired by well-known animals, but these Pokémon are based on surprising creatures that not everyone has heard of.
Long-tailed macaques in Indonesia use stones to masturbate, according to a new study that furthers researchers' understanding of the monkey "sex toy" hypothesis.
A grisly photo of a dead fly blooming with mind-controlling fungus has won top prize in the second annual BMC Ecology and Evolution Image Competition
Researchers have created a 3D computer model of a megalodon shark based on fossilized teeth and vertebrae, giving us our best look yet at the ancient behemoths.
A Saccorhytus species that's been described as an "angry Minion" and a "wrinkly ball sack" isn't a human ancestor, according to a new study.
A glowing snailfish riddled with antifreeze protein was discovered in Greenland. The protein helps protect it from the cold.
An armored dinosaur that weighed as much as a housecat has been discovered in South America. Though it resembles a primitive relative of ankylosaurus, it came from late in dinosaur history.
Almost all sea turtle hatchlings are emerging from their eggs as females on some Florida beaches. What's going on?
Scientists have identified a woodlouse relative — a 10-inch-long, creamy yellow critter called Bathynomus yucatanensis from deep in the Gulf of Mexico.
A new video released by the Monterey Bay Aquarium Research Institute (MBARI) shows off 2012 footage of an unnamed species of spaghetti worm.
A team of "specially commissioned hunters" tracked down and killed one member of a "monkey gang" responsible for more than 50 attacks in the Japanese city of Yamaguchi.
A strange shark caught off Belize in the Caribbean was likely a Greenland shark or Greenland shark hybrid, according to a new study.
Cameras on drones recently captured aerial images of nomad jellyfish as they swarmed by the thousands in coastal waters near Israel.
Scientists collected 55 creatures in a largely unexplored area of the Pacific Ocean, 39 could potentially be new species.