13 August 2014, 12:06 AM ET
Measuring 10 feet long and weighing in at more than 400 pounds, it's hard to imagine that the arapaima, the largest fish in the Amazon River basin, could ever go missing. But these huge fish are quickly disappearing from Brazilian waterways.
12 August 2014, 03:18 PM ET
Just in time for World Elephant Day (Aug. 12), New York today banned the sale of ivory in the state.
12 August 2014, 11:20 AM ET
The tough little Antarctic midge has only 99 million base pairs in its genome, making it the owner of the smallest insect genome ever sequenced. The midge lacks repetitive DNA segments once called 'junk DNA,' perhaps because of its extreme lifestyle.
12 August 2014, 11:00 AM ET
Geckos can quickly turn the stickiness of their feet on and off, a new study finds.
12 August 2014, 09:34 AM ET
From tennis shoes to banana bunches, some strange things have been known to wash up on beaches. But one of the strangest has to be the two-headed dolphin whose carcass was recently found on a beach in Turkey, according to Turkish media reports.
11 August 2014, 03:18 PM ET
Primitive creatures known as rangeomorphs vanished from the seas because they couldn't harvest nutrients from the water column and because they became prey to fast-moving Cambrian creatures, a 3D reconstruction suggests.
11 August 2014, 11:34 AM ET
Researchers using submersible robots to track the hunting behaviors of seal-stalking great white sharks were astonished when one of their subjects mistook their scientific probe for edible prey.
11 August 2014, 10:23 AM ET
An underwater robot designed to unobtrusively tail great white sharks got a sneak attack from a shark.
09 August 2014, 03:08 AM ET
Macaque monkeys grow up with their mothers and are often not familiar with their fathers. But they can recognise the paternal side of the family even without ever being introduced to them.
08 August 2014, 07:14 PM ET
Bats are the only mammals that fly. There are more than 900 types of bats, ranging in size from the flying fox to the tiny bumblebee bat.
08 August 2014, 12:53 AM ET
Does your pet reveal your political leanings?
07 August 2014, 02:00 PM ET
Seals and sea lions are semiaquatic mammals with flippers for feet. There are more than 30 species and they live all over the world.
07 August 2014, 11:20 AM ET
Preventing shark attacks doesn't require culling sharks. A new study finds that a shark catch-and-release program in Brazil dramatically decreased, by 97%, the number of attacks on humans.
07 August 2014, 08:01 AM ET
It's not every day that scientists identify a new mammal — especially one that can grow to be more than 8 feet (2.4 meters) long. But researchers recently named a new species of cetacean: the Australian humpback dolphin, Sousa sahulensis.
07 August 2014, 02:48 AM ET
With no small amount of irony, the tables have turned with research discovering that we need whales for a healthy marine ecosystem, or at least their poop.
06 August 2014, 01:41 PM ET
In the "twilight zone" of the deep ocean, strange glowing sharks have evolved eyes that are adapted for seeing complex patterns of light in the dark, new research reveals.
05 August 2014, 07:02 PM ET
The barrel jellyfish, isn't just the largest jelly found in the waters around the United Kingdom, it's also one of the animal kingdom's most strategic searchers, according to a new study.
05 August 2014, 07:01 PM ET
Fossils from a fox-sized dinosaur have been discovered in what is now Venezuela. The dinosaur remains suggest these beasts lived in herds and that they advanced quickly across the globe after a mass extinction.
05 August 2014, 07:01 PM ET
The new two-legged dinosaur, which lived about 200 million years ago, suggests dinosaurs lived in herds and that the beasts advanced quickly across the globe after a mass extinction claimed at least half of all species on Earth, researchers say.
05 August 2014, 02:03 PM ET
The coyote is a clever animal that has adapted well to growing human populations and habitat loss.
05 August 2014, 01:28 PM ET
A couple of surfers off the northeast coast of England had a close encounter of the adorable kind, when a curious young seal paid them an unusual visit.
05 August 2014, 01:23 PM ET
Scientists recently found a new hotspot for juvenile whale sharks in the Red Sea that could offer clues about their life history.
05 August 2014, 01:01 PM ET
Horses use a cocked head, perked ears and eyes to communicate, new research suggests.
05 August 2014, 12:24 PM ET
Bobcats and lynx are cats that have stubby tails and ears topped with furry black tufts.
04 August 2014, 11:48 AM ET
The platypus is one of the most unusual creatures in the animal kingdom. It looks like it was put together from parts of other animals; females lay eggs, and males are venomous.
03 August 2014, 09:29 AM ET
To save bonobos, science must first get into the minds of those responsible for determining the animals' fate.
02 August 2014, 12:24 PM ET
Porcupine mating involves short periods of fertility, urinary ejaculation and vicious battles between males. In the end the female controls how things play out, and, yes, she must lay down her quills so a male can safely mount her.
01 August 2014, 03:16 PM ET
A family of long-legged shorebirds adopted a fuzzy baby duckling in California's San Francisco Bay.
01 August 2014, 02:31 PM ET
An invasion is afoot along beaches from Oregon to California: Millions of glassy purple, jellyfish-like sea creatures that look like sailboats have been washing ashore.
01 August 2014, 12:57 PM ET
Red-footed tortoises have learned how to use the device in exchange for a strawberry, a new study reports. Researchers taught the tortoises a few touch-screen basics in order to learn about the animals' navigational techniques.
01 August 2014, 12:11 PM ET
They are solitary creatures that live about 7 to 12 years in the wild.
31 July 2014, 08:02 PM ET
Scientists have rendered a once-furry mouse transparent, its brain, guts and all. Here's a look at the beauty beneath the rodent's skin.