30 October 2014, 03:44 PM ET
Halloween is a time to celebrate mythical creatures that haunt our dreams, but some of these beasts have real-life counterparts in the animal world.
30 October 2014, 02:08 PM ET
A deadly new fungal disease that originated in Asia is killing salamanders and newts in Europe and could soon land on U.S. shores, home to the most diverse population of salamanders worldwide.
30 October 2014, 01:07 AM ET
In elite racehorses, biology is pushed to the limit, it’s not surprising then that injuries most commonly occur where the highest loads are generated.
29 October 2014, 09:12 PM ET
Black widows are spiders that are known for the females' unique appearance and tendency to eat their mates.
29 October 2014, 01:06 AM ET
Local heroes are looking out for animals as Ebola spreads through West Africa.
28 October 2014, 10:18 PM ET
They're the tallest animal on Earth with necks that are 6 feet tall!
28 October 2014, 03:09 PM ET
Mammoth bones more than 70,000 years old emerged from the eroded river banks of a reservoir in Idaho this month. Paleontologists and students raced to rescue part of the beast's skull and a tusk, but they suspect more lies below the surface.
28 October 2014, 02:58 PM ET
A mammoth skeleton was discovered this month on the banks of a reservoir in Idaho. Paleontologists have rescued part of its skull and a tusk, but there could be a lot more buried below the surface.
28 October 2014, 02:32 PM ET
The loss of so many large species, such as woolly mammoths and saber-toothed cats, around 12,000 years ago could help researchers predict what will happen as mammals such as elephants, rhinoceroses and tigers disappear today.
28 October 2014, 02:05 PM ET
Once down to only 15 animals, giant tortoises on Espãnola, a tiny Galápagos island, now number about 1,000, making the reptile one of conservation's greatest success stories.
28 October 2014, 09:05 AM ET
Sure, they look creepy, but spiders aren't as spooky as you might think.
27 October 2014, 04:09 PM ET
What happens to a body at sea? A group of scientists dropped pig carcasses into the ocean to find out.
27 October 2014, 12:42 PM ET
Reptiles that have sex early and frequently in life and feast on meat, tend to "live fast, die young," as the rock-and-roll saying goes, according to a new study.
27 October 2014, 08:02 AM ET
Snake sex involves mating balls, battles similar to arm-wrestling and, sometimes, asexual reproduction.
24 October 2014, 06:00 PM ET
The vision of jumping spiders is almost equal to the sight of humans. Researchers, however, didn't know how to study the arachnids' visual system for one simple reason: every time they tried to look at the spiders' brains, the animals would explode.
24 October 2014, 04:14 PM ET
Researchers have developed a new technique that helps them peer into the brain of a jumping spider, an arachnid famed for its excellent vision, and record how the brain cells in its visual system process images.
24 October 2014, 04:01 PM ET
It’s difficult to study the jumping spider’s brain, but researchers have found a new technique that lets them analyze the spider’s neural activity.
23 October 2014, 08:15 PM ET
They have a fierce bark and bite!
23 October 2014, 07:29 PM ET
Researchers at Cornell University have been researching the brain processes of Jumping Spiders (Phidippus audax).
Credit: Cohen lab (Cornell University), Tsevi Beatus, Paul Shamble, Gil Menda
23 October 2014, 03:15 PM ET
A striking black-and-white photo of lions took first prize at the 50th Wildlife Photographer of the Year competition, but the international panel of judges awarded a handful of other gifted artists of all ages.
23 October 2014, 02:37 PM ET
A stunning black-and-white photo of five lionesses relaxing with their cubs in Tanzania's Serengeti National Park has taken the top prize at the 50th Wildlife Photographer of the Year competition, held this week at London's Natural History Museum.
23 October 2014, 07:26 AM ET
A fossil tusk rescued from the sea proves mammoths swam to Southern California's Channel Islands much earlier than thought, and they beat humans there.
22 October 2014, 08:25 PM ET
There are only two species of these chomping machines, find out where they are!
22 October 2014, 02:12 PM ET
A new study of fossil records estimates that the 60-foot-long (18 meters) Megalodon shark went extinct 2.6 million years ago.
22 October 2014, 02:08 PM ET
Groups of roving chimpanzees were caught red-handed stealing crops from farmers in Uganda at night by hidden camera traps.
22 October 2014, 01:47 PM ET
Hidden cameras caught chimpanzees in Uganda raiding farmers’ crops at night, an activity possibly brought about by habitat destruction.
22 October 2014, 01:13 PM ET
This highly speculative animation is based upon analysis of a nearly complete Deinocheirus mirificus skeleton. It suggests the dinosaur may have plodded along river bottoms to forage for fish.
22 October 2014, 01:01 PM ET
A duck-billed, humpback, ostrichlike dinosaur has been unearthed in Mongolia at a site illegally excavated by poachers.
22 October 2014, 12:59 PM ET
Sex is older than anyone had ever known. New research reveals that 385 million-year-old fish did the deed — and they may have invented copulation as much as 430 million years ago.
22 October 2014, 12:40 PM ET
The first animals to have sex were tiny armored fish called microbrachius that copulated some 385 million years ago in a square-dancing type maneuver.
22 October 2014, 08:19 AM ET
During the early Permian, carnivores greatly outnumbered herbivores on land, so top predator Dimetrodon supplemented its diet by hunting sharks.
22 October 2014, 07:25 AM ET
A shrewlike creature in Madagascar that can hibernate for at least nine months of the year without waking may help reveal how mammals survived the cataclysm that ended the age of dinosaurs, researchers suggest.
22 October 2014, 07:21 AM ET
A shrewlike mammal that lives in the forests of Madagascar is a living fossil of sorts. The creature can hibernate for nine hours straight.
21 October 2014, 09:06 PM ET
Their horns are made of the same stuff as human fingernails!
21 October 2014, 03:52 PM ET
Spiders — whether you abhor them or adore them, you certainly can't ignore them. We asked our readers to send us their coolest arachnid photos, and they happily obliged.
21 October 2014, 10:51 AM ET
A tiny drone has captured stunning images of a killer whale pod, revealing which whales are pregnant and malnourished.