10 November 2014, 10:03 PM ET
Every few months, almost like clockwork, a media hype about these arachnids surfaces in the press. But we rarely find a balanced story about deadly spiders. Just how toxic are they, really?
10 November 2014, 03:00 PM ET
A new study has revealed the genetic changes that led cats to become domesticated, and many are related to reward seeking and fear conditioning.
09 November 2014, 06:15 PM ET
Despite their recognition as an endangered species and the supposed protection that brings, pangolin are now the most trafficked wild mammal species in the world.
08 November 2014, 06:10 AM ET
The bizarre, convoluted nasal passages of tanklike armored dinosaurs may have helped the animals cool the blood headed to their tiny brains, preventing overheating.
07 November 2014, 03:49 PM ET
The fossilized remains of a mare and her tiny, unborn foal tell researchers that reproduction in ancient horses wasn't too different from that of modern horses, new research finds.
07 November 2014, 09:49 AM ET
Flaming sex involves make-up, elaborate group dances and seasonal monogamy.
07 November 2014, 07:40 AM ET
The young woolly mammoth's brain is the only such practically intact specimen known, revealing even the folds and vessels to scientists. The well-preserved remains of the ice age beast were discovered in the Siberian permafrost.
07 November 2014, 07:37 AM ET
Take a look at images of a 39,000-year-old woolly mammoth with a preserved brain discovered in the Siberian permafrost.
06 November 2014, 11:21 PM ET
Sanctuaries are the final stop for many of the most exotic abandoned animals.
06 November 2014, 11:05 PM ET
Every abandoned tiger needs a home, but not all sanctuaries are created the same.
06 November 2014, 05:40 PM ET
Over 400 million years of evolution have contributed to making insects the most diverse group of animals in the world, a new study finds.
06 November 2014, 05:37 PM ET
With over 400 million years of evolution under their belts, it's no wonder that insects are the most diverse group of animals on Earth.
06 November 2014, 02:48 PM ET
Just like Navy engineers who jam the sonar of enemy ships, bats can jam the signals of other bats to ward off competition for food, a new study finds.
06 November 2014, 02:47 PM ET
Mexican free-tailed bats use echolocation to hunt, but they also emit jamming signals to fend off competitors. Mexican free-tailed bats use echolocation to hunt, but they also emit jamming signals to fend off competitors.
06 November 2014, 01:57 PM ET
An orphaned sea otter pup, just a week old and underweight, was rescued from a beach in California last month. Now, the camera-friendly creature is starting over in the Midwest, with 24-hour care at Chicago's Shedd Aquarium.
06 November 2014, 12:59 PM ET
Because bees are big business in the U.S., collecting and sharing data about the insect is important to address the decline in bee populations.
06 November 2014, 12:55 PM ET
Hidden away under frozen ground for nearly 10,000 years, one extremely well-preserved creature is finally ready to give up its secrets.
06 November 2014, 12:45 PM ET
The preserved remains of a Steppe bison (Bison priscus) — an ancient relative of modern bison — was found in eastern Siberia. Scientists have now performed a necropsy of the 9,000-year-old bison mummy.
06 November 2014, 11:45 AM ET
Abandoned on a beach in California, an adorable otter pup now has a new home at Chicago's Shedd Aquarium. For now, the otter is simply called "Pup 681." She's getting 24-hour attention so that her caretakers can essentially teach her how to be an otter.
06 November 2014, 10:37 AM ET
New laser scans of the dodo, perhaps the famous animal to have gone extinct in human history, have unexpectedly exposed portions of its anatomy that are revealing how the mysterious, flightless bird once lived.
06 November 2014, 10:36 AM ET
Perhaps the most famous extinction in human history was that of the flightless dodo bird. Here's a look at images of dodo skeletons and laser scans of the giant pigeon.
06 November 2014, 10:35 AM ET
The largest venomous snake ever known once slithered through the grasslands of what is today northern Greece some 4 million years ago, creating a mystery about how the 60-pound beast reached its gargantuan size.
05 November 2014, 10:11 PM ET
Arctic squirrels are circadian superheroes.
05 November 2014, 09:44 PM ET
The arctic ground squirrel's ability to adapt to constant daylight may lead to answers for human sleep disorders and other health problems.
05 November 2014, 08:23 PM ET
The international 1KITE project used DNA sequencing and new algorithms to devise the phylogenetic tree. This data dates the origin of insects to about 479 million years ago and today's insects to about 345 million years ago.
05 November 2014, 02:51 PM ET
New research shows how external genitals arose from very different starting places for reptiles and mammals.
05 November 2014, 02:47 PM ET
Dinosaurs that lumbered around the ancient supercontinent Gondwana had a warm-blooded neighbor — a "chewing machine" with big eyes, excellent hearing and an acute sense of smell, according to a new study.
05 November 2014, 02:44 PM ET
The finding of a well-preserved skull of a new species, called Vintana sertichi, in Madagascar provides new insights into these mysterious mammals.
05 November 2014, 01:17 PM ET
A 248-million-year-old fossil of an ancient reptile found in China is the oldest known member of a well-known group of marine reptiles, and may have lived both on land and in the sea.
05 November 2014, 10:56 AM ET
A large dinosaur, raccoon-size mammal and crocodile-like creature all walked toward a freshwater lake during the Early Cretaceous 118 million years ago, leaving their footprints behind in a sedimentary band of earth.
05 November 2014, 10:55 AM ET
A new finding of 118-year-old footprints of an early mammal, crocodile and dinosaur are helping researchers learn more about these ancient animals that lived in present-day Angola.
05 November 2014, 09:25 AM ET
Rovers — especially cute ones that are disguised as penguin chicks — seem to be better at spying on penguins than humans are.