20 May 2015, 03:10 PM ET
A fragmented femur bone hidden underwater for millions of years has become the first evidence that a dinosaur once roamed Washington, a new study finds.
20 May 2015, 09:50 AM ET
Millions of years ago, the common ancestor of all living snakes — a long creature with tiny hind limbs as well as ankles and toes — could be found slithering over the damp soil of forests in search of soft-bodied prey, a new study finds.
19 May 2015, 12:50 PM ET
Given the obstacles of modifying a chicken into a dinosaurlike creature, how close are scientists to creating a dino-chicken?
19 May 2015, 09:01 AM ET
Even though bamboo is their main food source, giant pandas are horrible at digesting it, a new study of their gut bacteria finds.
19 May 2015, 03:11 AM ET
An enormous turtle fossil grew even bigger after an amateur fossil collector found its missing piece.
18 May 2015, 03:10 PM ET
An amateur fossil collector recently found a turtle bone fragment that is the exact match to a broken fossil bone found in the 19th century, revealing the turtle was one of the largest that ever lived.
18 May 2015, 07:16 AM ET
A citizen-science project will examine the microbiome of cats' digestive systems, in both house pets and wild animals.
17 May 2015, 09:38 AM ET
Rather than mundane, lazy sex, sloths participate in quite the mating game. In fact, sloth sex involves high-pitched screams, promiscuity and eye-gouging battles.
15 May 2015, 05:48 PM ET
Millions of tiny spiders recently fell from the sky in Australia, alarming residents whose properties were covered with the creepy critters and mounds of their silky threads.
15 May 2015, 03:44 PM ET
A silvery-gray conger eel had already gone limp by the time fishermen found it on their trawler, but its shocking length of 7 feet (2.1 meters) still caught them off guard, according to the British company that found the huge eel.
14 May 2015, 02:02 PM ET
The tire-size opah, which can weigh up to 200 pounds, thrives in cold ocean depths by keeping its blood warm, making it the first fish ever discovered to generate its own body heat. It does so in a bizarre way.
14 May 2015, 02:00 PM ET
The moonfish, which are about the size of a manhole cover, is now considered the first-known warm-blooded fish. Here's a look at amazing images of the oddball fish.
14 May 2015, 07:18 AM ET
In a quest to figure out what makes some male sage grouse so sexy, one scientist has turned to partly taxidermied robots.
13 May 2015, 02:11 PM ET
Trap-jaw ant Odontomachus brunneus use their quick moving mandibles, clocked at speeds reaching 60 meters per second, to avoid capture and death from predatory larval antlion.
13 May 2015, 02:02 PM ET
When threatened, some trap-jaw ants can use their powerful jaws like a spring to fling themselves out of death pits dug by stealthy predators, a new study finds.
13 May 2015, 07:51 AM ET
Giant panda Mei Xiang (may-SHONG) may have another cub on her paws in a few months. Scientists and veterinarians gave the furry black-and-white starlet two rounds of artificial insemination on April 26 and 27 at the National Zoo in Washington D.C.
13 May 2015, 07:32 AM ET
At 3,456 pounds (1,570 kilograms), a great white shark named Mary Lee may be one of New York's largest tourists.
12 May 2015, 01:38 PM ET
The shark, named Mary Lee, was tagged off of Cape Cod, MA in 2012 by nonprofit research group OCEARCH. Her tracker’s radio ping caught the 3,456 pound (1,568kg) animal navigating the waters off of Jones Beach in New York in May 2015.
12 May 2015, 09:18 AM ET
Sir David Attenborough, the world-famous nature host, recently found himself in a bat cave in Borneo, dangling from a rope 300 feet (91 meters) above the ground, as a drone hovered around filming him.
12 May 2015, 06:20 AM ET
Chicks with dino-snouts? With a little molecular tinkering, for the first time scientists have created chicken embryos with broad, Velociraptor-like muzzles in the place of their beaks. The results shed new light on how the bird beak evolved.
12 May 2015, 06:19 AM ET
Scientists have created chicken embryos with dinosaur-like snouts, revealing the genetic tweaks that may have led to the development of the bird beak.
07 May 2015, 03:15 PM ET
The shiny, fossilized brains of two ancient sea-monsterlike creatures are helping researchers understand how the ancestors of modern-day arthropods, such as scorpions and lobsters, evolved, as shown in a new study.
07 May 2015, 08:32 AM ET
A sinkhole in Madagascar contained hundreds of fossils of extinct primates, hippos, rodents and the island's largest predatory cat.
07 May 2015, 06:54 AM ET
A newly translated report reveals the dodo bird was not the only wacky animal inhabitant of the island of Mauritius: Bad-tempered parrots, wart-faced pigeons and several other now-extinct but noteworthy indigenous animals called this land home.
07 May 2015, 06:45 AM ET
A massive whale's nerves can unfold and recoil like a bungee cord, explaining how they can balloon their mouths while feeding.
07 May 2015, 12:11 AM ET
The ivory trade is taking a hit as Chinese social media ramps up to protect elephants.
06 May 2015, 11:35 PM ET
In China, social media is changing ivory's social status.
06 May 2015, 06:00 PM ET
Every spring, red-sided garter snakes leave their hibernation burrows to engage in a frenzied jumble of mating. But doing the deed is no easy feat for males.
06 May 2015, 03:04 PM ET
The Siberian tiger is a rare beauty, best seen from not too close.
06 May 2015, 07:09 AM ET
A sinkhole in Madagascar contained hundreds of fossils of extinct primates, hippos, rodents and the island's largest predatory cat
06 May 2015, 12:01 AM ET
Scientists recently took a close look at teeth of fossilized penis worms and discovered a new species.
02 May 2015, 03:16 AM ET
Horses are ungulates — mammals with hooves. There are more than 400 different breeds.