08 July 2015, 07:13 AM ET
An anxious temperament is inherited via overactive brain regions passed down by mom and dad. But there's room for experience and the environment to help soothe an anxious mind.
08 July 2015, 07:03 AM ET
Hundreds of millions of years ago, marine animals swam in a vast ocean near the supercontinent of Gondwana. Now, these creatures' fossils litter the rocky desert of southeastern Morocco.
08 July 2015, 07:02 AM ET
Morocco's vast, rocky deserts were once covered with oceans teeming with life during the Ordovician Period. These stunning animals, now fossilized, would be unknown were it not for the work of a Moroccan fossil collector and a broke graduate student.
07 July 2015, 07:05 PM ET
Spider sex just got a little more interesting. Researchers now find that the spider equivalent of the penis isn't numb like once believed; it's filled with nerves that might help the spider ensure fertilization.
07 July 2015, 02:10 AM ET
Can unique and rare American livestock be saved from extinction?
07 July 2015, 01:14 AM ET
American livestock were once diverse and unique, but no longer — can a new IVF effort save some of the rarest remaining herds before they fade away?
06 July 2015, 03:21 PM ET
An occasional dolphin kill won't be enough to sustain polar bears as global climate continues to warm.
06 July 2015, 10:17 AM ET
Spiders can dance on water like tiny ballerinas pirouetting across a slippery stage.
06 July 2015, 10:13 AM ET
You probably already knew that spiders are extraordinary creatures when they're on land. But a new study finds that these critters are also quite remarkable when they're on the water.
02 July 2015, 11:25 PM ET
The majestic vulture is on the decline across the globe, and if they fade, what will happen to the carrion they clear from the Earth?
02 July 2015, 03:41 PM ET
Fourth of July weekend is a popular time to hit the beach, but this year, vacationers may not be the only ones swarming the waters off North Carolina.
02 July 2015, 02:00 PM ET
Slinky snake robots could get a better grip when climbing, thanks to new research on how a seahorse's tail works, according to a new study.
02 July 2015, 12:00 PM ET
The woolly mammoth's genome has been sequenced, revealing several key adaptations to the cold that could help scientists design elephant-mammoth hybrids.
02 July 2015, 10:27 AM ET
New photographs of deep-sea creatures could hold the key to helping predict climate change.
02 July 2015, 10:22 AM ET
See the vibrant creatures who dwell on the Arctic Ocean seafloor.
02 July 2015, 10:15 AM ET
Despite their reputation as wildlife killers, cats seem to stick to urban and residential areas, while coyotes prowl wilder spaces, research finds.
02 July 2015, 06:52 AM ET
Coastal seabirds can fly over large swaths of ocean for days on end, not stopping until they reach their favorite feeding spot. Scientists have long wondered how these birds manage to find their way home.
01 July 2015, 06:29 PM ET
A goldfish meant to be a light snack for one the world's largest freshwater fish has lived undetected in the same tank with its predator for seven years.
01 July 2015, 05:36 PM ET
Like cast members on a distasteful reality show, Portuguese man-of-war "jellyfish" are descending upon the Jersey Shore in increasing numbers.
01 July 2015, 02:29 PM ET
About 48 million years ago, a distant relative of the "Jesus lizard," named for its knack for walking on water, darted around the tropical rainforests of ancient Wyoming, a new study finds.
01 July 2015, 02:25 PM ET
The 48-million-year-old skull of an ancient Jesus lizard relative found in Wyoming may shed light on the evolutionary history of lizards, iguanas and chameleons, a new study finds.
30 June 2015, 01:02 PM ET
Deep beneath the surface of the Earth, in a dank and dismal cave, lives Hades, the invertebrate king of hell.
29 June 2015, 06:29 PM ET
North Carolina's recent bevy of shark attacks are the result of many diverse factors, according to experts.
29 June 2015, 03:00 PM ET
A spiky, wormlike creature with 30 legs — 18 clawed rear legs and 12 featherlike front legs that likely helped it filter food from the water — once lived in the ancient oceans of the early Cambrian period, about 518 million years ago, a new study finds.
29 June 2015, 02:17 PM ET
Some of the most ferocious jaws in the animal kingdom belong to a creature that's rather small and quite misunderstood.
27 June 2015, 10:30 AM ET
Antechinus sex involves ambushes, intermittent copulation lasting 14 hours and ultimately suicide.
26 June 2015, 05:08 PM ET
Heritage livestock breeds are going extinct at the rate of one species per month. In a 20-year project to cryopreserve genetic material from endangered North American breeds, SVF Foundation aims to insure against potential catastrophe.
26 June 2015, 02:33 PM ET
Ever wonder what might happen if a python ate a porcupine? Well, wonder no more. One of these giant snakes — which kill prey by suffocating it and then consuming it whole — recently dined on a porcupine and didn't live to brag about it.
26 June 2015, 06:11 AM ET
A company is making synthetic rhino horn in order to flood the market and drop the price, thereby reducing demand, but some conservationists say the approach could backfire.
25 June 2015, 04:43 PM ET
Florida panthers are getting a lifeline in newly protected territory, but will it be enough?
24 June 2015, 02:13 PM ET
What's white and blind and hairy all over? A yeti, of course! Or rather, a yeti crab.
24 June 2015, 02:11 PM ET
They're white, blind and surprisingly hairy. They're yeti crabs.