The oldest-known ghost drawing has been discovered on an ancient Babylonian tablet as part of an exorcism ritual.
A grizzly bear attacked a photographer's camera trap and the resulting image won the Animals in their Environment category at the 2021 Wildlife Photographer of the Year competition.
A striking photo showing the "otherworldly beauty" of spawning groupers has won the 2021 Wildlife Photographer of the Year competition.
Greenland sharks may have a lifespan of hundreds of years in the Arctic and North Atlantic oceans, where much about their lives remains a mystery.
Murder hornets, or Asian giant hornets, are the world's largest wasps and are invading North America.
Humans are getting better at staving off death our technological and medical advances. But could humans ever become immortal?
Scotland's giant ice sheet has been recreated over Dundee in a stunning video that looks like the Wall from "Game of Thrones."
A photo showing a group of male cheetahs trying to cross a raging river in Kenya is part of the 2021 Wildlife Photographer of the Year competition.
Cookiecutter sharks rip small, cookie-shaped chunks out of sharks and whales much larger than themselves, but a new study finds these big animals make up only a small part of their diet.
Dogs regularly wag their tails to greet humans and other dogs, but what about their wild counterparts? Do wolves wag their tails?
Humanity is feeling the effects of climate change around the world, but could climate change make humans go extinct?
The longest-living animals can survive for centuries and millennia, even pausing the aging process altogether. Here are the longest-living animals in the world.
Sperm whales are the largest toothed whales, with enormous square-shaped heads and the biggest brains of any animal on Earth.
Scientists have found one of the world's rarest chameleons again after fearing the species was extinct due to shrinking forests.
Polar bears are the largest bear species and are supremely adapted to their Arctic habitat, whether they are prowling the ice or swimming in the sea.
Big cats are found all over the world, from Alaska to China, and each one is ferociously unique. Here are the nine biggest cats alive today.
Researchers have documented chimpanzees killing gorillas for the first time. The two fatal attacks were caught on film at a national park in Gabon, Central Africa.
Pikas eat yak poop to help them survive winters at high altitudes on the Qinghai-Tibetan Plateau in Asia.
Giant sharks have been lurking in the ocean for millions of years. Here are eight of the biggest sharks from the past and present.
Humans are slow and weak compared with bears, pumas and other large predators, but these beasts usually avoid us. Why don't these animals try to eat us more often?
American black bears are the smallest and most common bear in North America. They are highly adaptable, with a diet that includes honey and moose.
Cottonmouths, or water moccasins, are venomous snakes in North America that display white mouths when threatened.
Lemurs include a diverse group of primates, from sun-worshipping ring-tailed lemurs to the peculiar, nocturnal aye-aye.