16 October 2015, 05:24 PM ET
A mega shark that lived 300 million years ago would have made today's great whites look like shrimps, according to fossils of the beast unearthed in Jacksboro, Texas.
16 October 2015, 11:40 AM ET
The large and bulbous teeth of an early reptile likely helped it crunch beetles and other hard-shelled invertebrates about 290 million years ago, a new study finds.
15 October 2015, 07:45 AM ET
Mammals have been growing hair the same way for 125 million years.
14 October 2015, 02:00 PM ET
A cluster of baby duck-billed dinosaurs was uncovered in a slab of rock from a fossil-rich part of Mongolia known as "Dragon's Tomb."
14 October 2015, 11:17 AM ET
The winner of this year's contest invites you to consider a bee's perspective on the world.
13 October 2015, 04:09 PM ET
Two giant panda cubs were born today (Oct. 13) at the Toronto Zoo, becoming the first pandas ever born on Canadian soil.
13 October 2015, 07:07 AM ET
Almost 30 years after a horrific accident at the Chernobyl Nuclear Power Plant released massive amounts of radiation and became one of the world's worst nuclear catastrophes, many native wildlife species are once again finding refuge in the area.
13 October 2015, 02:30 AM ET
The phrase "busy as a beaver" aptly describes these big-toothed rodents that can change the landscape and their environment.
09 October 2015, 10:10 AM ET
A Michigan farmer unexpectedly discovered mammoth bones on his property, buried in the soil beneath a wheat field.
09 October 2015, 09:31 AM ET
Two Michigan farmers made an unexpected discovery in a wheat field last week: the ice-age bones of a mammoth that was likely slaughtered by ancient humans.
07 October 2015, 07:24 PM ET
A newly described species of rodent has a nose like a cute little piglet, ears that only a mother could love and teeth that would make Dracula run in fear.
07 October 2015, 03:13 PM ET
Scientists have figured out why some species have more females than males and others have more males than females. Turns out, sex chromosomes are the culprits.
07 October 2015, 11:00 AM ET
The age-old question of how the giraffe got its long neck may now be at least partly answered: Long necks were present in giraffe ancestors that lived at least 16 million years ago, a new study finds.
07 October 2015, 10:55 AM ET
An ancestor of the giraffe split into two evolutionary branches, one leading to the okapi with its short neck and the other branch leading to the giraffes.
07 October 2015, 07:36 AM ET
About 23 million years ago, an ancient hippo-size mammal used its long snout like a vacuum cleaner, suctioning up food from the heavily vegetated shoreline whenever it was hungry, a new study finds.
06 October 2015, 12:50 PM ET
Hundreds of new species have been discovered in the Himalayas in recent years, but many face danger as climate change and overdevelopment alter their habitats.
06 October 2015, 11:25 AM ET
The 23 million year-old animal, part of marine mammal group Desmostylia, had tusks and a long snout. Its anatomy reveals that it "sucked vegetation from shorelines like a vacuum cleaner," according to paleontologist Louis L. Jacobs.
06 October 2015, 06:43 AM ET
Chris the Sheep set a new Guinness World Record for the most wool sheared from a sheep in a single shearing.
05 October 2015, 12:00 PM ET
A furry, beaverlike mammal that survived the apocalyptic dinosaur-killing space rock that crashed to Earth 66 million years ago hid out in what is now New Mexico, grinding up leafy meals with its enormous molars.
04 October 2015, 08:58 AM ET
Sea hare sex involves hermaphrodites, mating chains and lengthy mating events.
02 October 2015, 11:06 AM ET
Chameleons may be known for their impressive color-changing abilities, but these curious creatures are also expert tree climbers Now researchers know why: the chameleons have twice as many wrist and ankle bones as was previously thought.
02 October 2015, 07:21 AM ET
Feral cats adjust their ranges depending on the greenery of their environment, which reflects the resources available.
01 October 2015, 11:44 PM ET
Turtles, tortoises and terrapins are reptiles with protective shells. They live on land, in the ocean and in lakes and rivers. There are more than 300 species.
01 October 2015, 05:12 PM ET
Not all owls look like the generic Halloween cutout.
01 October 2015, 12:05 PM ET
Snakes maintain most of the DNA sequences that mammals use to make legs — even though snakes lack limbs. Turns out the genes are responsible for phallus development in snake embryos.
01 October 2015, 12:02 PM ET
Images of snake embryos reveal how genes that enhance the growth of limbs are used to grow the phallus for these legless reptiles.
30 September 2015, 05:48 AM ET
The king crab could soon take over a whole new kingdom, and it has global warming to thank for the conquest.
30 September 2015, 01:08 AM ET
Rats are thin-tailed, medium-size rodents that are found all over the world.
29 September 2015, 05:04 PM ET
Below the tropical waves near the Solomon Islands, nighttime divers spotted a psychedelic vision: an endangered sea turtle glowing bright red and green.
29 September 2015, 04:02 PM ET
For tens of millions of years the Bathyal King Crabs have steered clear of the freezing Antarctic waters. Today, with waters around the frozen continent warmer than ever previously recorded...
28 September 2015, 03:27 PM ET
A new species of land snail in China is so tiny that 10 could fit through the eye of a needle, researchers report.
25 September 2015, 06:24 PM ET
A giant-panda cub at Smithsonian's National Zoo is no longer nameless: The furry youngster will now be called Bei Bei (BAY-BAY), which means "precious treasure" in Mandarin, according to his naming ceremony, held at the Smithsonian's National Zoo.