09 March 2016, 06:22 PM ET
The killer whale named Tilikum, who made headlines after killing his trainer at SeaWorld in 2010, has a respiratory infection that may ultimately take the orca's life, at age 35. But compared with its counterparts in the wild, the aquarium showstopper has
09 March 2016, 06:07 PM ET
WCS began with the founding of the New York Zoological Society in 1895 with a vision to save North American wildlife and connect people to nature via the Bronx Zoo.
09 March 2016, 04:36 PM ET
Why it's too soon to green-light grizzly bear hunts in Yellowstone.
09 March 2016, 05:47 AM ET
Visitors to Uganda's Queen Elizabeth National Park have observed wild pigs seeking out mongooses and lying down near them, allowing the nimble-fingered groomers to comb through the warthogs' skin and fur for ticks.
08 March 2016, 06:59 PM ET
To train two rhesus macaques, a control system navigated the wheelchair system (passive navigation) to a food reward. Both monkeys successfully acquired the ability to navigate themselves to the reward after they were conditioned.
08 March 2016, 01:11 PM ET
When it comes to genuinely cringe-inducing feeding adaptations, you'd be hard-pressed to find an example more hard-core than the hydra, which rips itself a new mouth at every feeding time.
08 March 2016, 12:39 PM ET
Hydra vulgaris capture and sting their prey with tentacles, but must sever their own cells to devour it. Scientists genetically engineered Hydra cells to color code two tissue layers in order to see the process in action.
08 March 2016, 07:32 AM ET
The recent deep-sea sighting of a highly unusual bluish-white octopod moved one of the mission scientists to paraphrase a Taylor Swift song, saying, "I have never, like, ever, seen that one."
07 March 2016, 12:41 PM ET
At 4,290 meters depth (14,075 ft.) the first operational dive of the Okeanos Explorer ROV discovered this incirrate (finless) low-musculature octopus-like creature, which lacks the usual pigment cells (chromatophores).
04 March 2016, 03:23 PM ET
Amber-imprisoned lizards from Southeast Asia that date back 99 million years ago make up the oldest assemblage of tropical lizards ever found in amber.
04 March 2016, 03:20 PM ET
Specimens of Gekkota, Lacertoidea, Squamata, Stem Chamaeleonidae, and Agamidae have been exquisitely preserved in fossilized plant resin. CT scans reveal organs (including tongues), skeletons and skulls.
04 March 2016, 02:16 PM ET
Astonishingly well-preserved Cretaceous lizards caught in amber include specimens with intact skin, visible skin pigment, and soft tissues — and in one case, a lolling tongue.
03 March 2016, 11:05 AM ET
A bevy of blind baby "dragons" may soon hatch in a Slovenian cave.
03 March 2016, 10:18 AM ET
A female olm, whose bizarre looks have given it the nickname of dragon, has laid 55 eggs at Slovenia's Postojna Cave. Over the next few months biologists will wait to see if the eggs result in the hatching of lots of baby dragons.
03 March 2016, 08:38 AM ET
The story of jaguars in Arizona is one of bloodshed, bad feeling and debate over the best way to conserve these big cats.
03 March 2016, 07:46 AM ET
Using high-speed cameras, scientists revealed that waterlily beetles use their wings to skim across the surface of the water like tiny skiers.
02 March 2016, 06:18 PM ET
Kangaroos are marsupials native to Australia. Their babies are called joeys and they live in groups called mobs.
02 March 2016, 01:16 PM ET
Waterlily beetles (Galerucella nymphaeae) move so fast, no human can see how they seem to disappear. Slowing down their disappearing act on video reveals they “water-ski", generating capillary gravity waves.
02 March 2016, 10:53 AM ET
Miniature kangaroos were short on bounce, but they outperformed their fanged kangaroo relatives, which lived alongside them and eventually went extinct.
02 March 2016, 07:50 AM ET
A mysterious, carnivorous marine mammal that lived 23 million years ago clamped down on its mollusk dinner much like a saber-toothed tiger grasped its larger prey, scientists have found.
01 March 2016, 05:16 PM ET
Jaguars are large cats that can be found in North, Central and South America. They are identified by their yellow or orange coats, dark spots and short legs.
01 March 2016, 10:14 AM ET
The only wild jaguar known to be living in the United States was captured by remote sensor cameras outside of Tuscon, AZ. Conservation CATalyst and the Center for Biological Diversity have been monitoring the Santa Rita Mountains for the endang
01 March 2016, 07:31 AM ET
El Jefe is the only known jaguar in the United States, but these elusive cats also live in Brazil's Pantanal region. Here's a look at the stoic and beautiful big cats in the wild.
29 February 2016, 11:27 PM ET
Kingsnakes are medium-size nonvenomous snakes that kill by constriction. They are one of the most common snakes in North America.
29 February 2016, 07:42 PM ET
Fossils of an ancient creature resembling a shrimp with an armored head contain the oldest and best-preserved nervous system ever found.
29 February 2016, 07:04 AM ET
Tyrannosaurus rex, king of the dinosaur age, wasn't a North American native, a new study suggests. And once the beast came onto the scene it muscled out all its competitors and took over.
26 February 2016, 07:27 AM ET
If aliens visited Earth tomorrow, would they realize that dogs — from the spotted dalmatian, to the giant Great Dane, to the tiny Chihuahua — are all the same species?
25 February 2016, 11:56 PM ET
Rat snakes are medium-to-large, nonvenomous snakes that kill by constriction. Recent research has complicated the taxonomic classification of rat snakes.
25 February 2016, 12:47 PM ET
Communities of deep-sea marine life cause a low-frequency humming in the ocean, as the creatures swim to and from the surface to feed.
24 February 2016, 03:33 PM ET
A baby gorilla was recently delivered by a rare emergency caesarean procedure, after her mother developed a potentially life-threatening condition, according to officials at the Bristol Zoo Gardens in the United Kingdom.
24 February 2016, 03:30 PM ET
A Jurassic-age dinosaur suffered from eight devastating maladies during its lifetime that likely caused the paleo-beast an enormous amount of pain and possibly made it difficult to hunt, a new study suggests.
24 February 2016, 02:32 PM ET
A team of scientists took a closer look at declining bee populations in the Netherlands and discovered something unexpected — the bees were getting smaller.