03 October 2014, 08:18 PM ET
There are nine subspecies of this largest member of the cat family, all of which are endangered.
03 October 2014, 05:09 PM ET
From frightful to downright odd, evolution has created some strange-looking critters.
03 October 2014, 07:40 AM ET
Instead, human interference in cheetah territory is harming the big cat's ability to find food, the researchers found.
03 October 2014, 02:27 AM ET
With more than 50 percent of wildlife disappearing in the last 40 years, something needs to change.
02 October 2014, 09:20 PM ET
Lions have a fierce roar and roam in prides, you can see pictures and learn more facts here.
02 October 2014, 01:06 PM ET
A newly discovered 52-million-year-old fossil of an "ant-loving" beetle is the oldest example of its species on record, and may help researchers learn more about this social parasite, a new study finds.
02 October 2014, 07:30 AM ET
In a series of arrests from August to September, police caught four people peddling the gills, snouts and other parts of rays, among other grisly animal products.
02 October 2014, 01:43 AM ET
Iceland is expanding whaling, and the United States needs to do more than just protest.
01 October 2014, 10:54 AM ET
After watching a demonstrator lizard open a wired door that led to a mealworm reward (not seen on the video), the lizard successfuly opened the door on its turn.
01 October 2014, 09:56 AM ET
The Humane Wildlife Services were called in when a opossum found himself trapped in a store in Washington, DC. The found the opossum hiding in a bag and malnourished. They took him to an animal shelter for treatment and was released after 6 days.
01 October 2014, 08:43 AM ET
Areas contaminated with anthrax lure grazing animals like zebras, which could lead to new rounds of infections. Anthrax-infected carcasses might release more nutrients into the soil than other carcasses, making the sites attractive to grazers.
01 October 2014, 08:23 AM ET
Brilliant shades of blue and aqua coat the iridescent lips of giant clams, but these shiny cells aren't just for show, new research finds. The iridescent sheen directs beams of sunlight into the interior of the clam, providing light for algae inside.
01 October 2014, 08:17 AM ET
New research reveals that zebras, wildebeest and other wildlife are lured to sites contaminated by anthrax bacterium, possibly aiding in the spread of the infectious disease.
30 September 2014, 07:24 PM ET
This endangered animal is the largest of the great apes.
30 September 2014, 05:01 PM ET
The number of mammals, birds, reptiles, amphibians and fish on Earth dropped by 52 percent from 1970 to 2010, according to the World Wildlife Fund's newly released Living Planet Report.
30 September 2014, 02:10 PM ET
When dinosaurs evolved into birds, they adapted their bones in order to take flight. Now, a new study explains how the nine bones of the dinosaur wrist turned into four bones in modern birds.
30 September 2014, 02:02 PM ET
Scientists may have recorded chimpanzees learning skills from each other in the wild for the first time, according to a new study.
30 September 2014, 01:22 PM ET
New research reveals how dinosaur arms evolved into the wrists of modern birds. Dinosaurs had to alter their very bone structure as they evolved to become flying birds.
30 September 2014, 11:11 AM ET
Every evening, sunset signals the start of dinner for billions of wiggling sea monkeys living in the ocean. As these sea monkeys swarm to the surface, they may contribute as much power to ocean currents as the wind and tides do, a new study reports.
30 September 2014, 10:34 AM ET
In a study of how zooplankton migration affects ocean currents, sea monkeys were subjected to a bright laser light and they collectively followed the brightest spots.
30 September 2014, 07:22 AM ET
Dolphins can now add magnetic sense to their already impressive resume of abilities, new research suggests.
29 September 2014, 08:54 PM ET
They may be tiny, but they can take down a venomous scorpion!
29 September 2014, 01:58 PM ET
Octopuses, with their underwater dexterity and camouflage abilities, have inspired much technological innovation. Here are some novel technologies that have been created based on the sea creature.
29 September 2014, 08:38 AM ET
In the American Southwest, where man has continued to build his homes farther from the center of established cities, the urban bobcat has become a common subdivision neighbor.
26 September 2014, 07:56 AM ET
Fossilized, primitive amphibians with odd-looking appendages, some with extra toes and deformed shapes, suggest the ability of some vertebrates to regenerate or regrow amputated limbs first evolved at least 300 million years ago.
26 September 2014, 01:13 AM ET
Where they live, what they eat and conservation measures.
25 September 2014, 06:56 PM ET
These endangered beasts are the largest land animals on Earth.
25 September 2014, 12:00 PM ET
Birds didn't evolve in one fell swoop from their dinosaur ancestors, suggests a newly constructed dinosaur family tree showing our feathery friends evolved very gradually, at first.
24 September 2014, 07:09 PM ET
An amazing video from the Florida Keys shows a curious domestic cat nearly become a midnight snack for an American alligator.
24 September 2014, 05:35 PM ET
They're one of the greatest endangered species success stories.
24 September 2014, 03:46 PM ET
The camera trap video shows a curious domestic cat about to get a huge surprise. A Florida alligator nearly catches the feline in its fearsome jaws. Alligators live in wetlands throughout the Lower Florida Keys.
24 September 2014, 02:14 PM ET
Take a closer look at these caterpillars, bugs, moths, wasps and butterflies to learn more about insects found in the eastern half of the United States.