05 November 2013, 05:45 PM ET
In this expose of a 'canned' rhino hunt, the Humane Society shows how a rhino that's been raised in captivity and acclimated to humans doesn't stand a chance against an armed poacher looking to bag a trophy.
05 November 2013, 05:04 PM ET
America's pronghorn are adapting to the animal overpasses that guide the creatures safely over a major highway as they make their annual 93-mile migration across Wyoming.
05 November 2013, 12:35 PM ET
Every fall, thousands of polar bears gather on the southwest banks of Hudson Bay, in Canada, to wait for sea ice to form so they can hunt. Now, thanks to the philanthropic media organization Explore.org, anyone with an Internet connection can watch the an
05 November 2013, 12:25 PM ET
A global warming event about 50 million years ago led tiny ancestral horses to decrease in size by about 20 percent, new research suggests. This was the second instance in which warming caused decreases in mammal body size.
05 November 2013, 11:31 AM ET
Dark-field microscopy was used to capture this amazing image of a marine worm, which took third place at Nikon’s 2013 Small World Photomicrography competition.
05 November 2013, 11:13 AM ET
When other pregnancy tests fall short, a poop-sniffing beagle named Elvis could reveal whether or not a polar bear has one on the way.
05 November 2013, 10:28 AM ET
Data on jellyfish populations is making it hard to figure out if they are on the rise, and – if that rise is indeed happening – why it is so.
05 November 2013, 07:39 AM ET
An ancient hunk of shark poop, dating to about 70 million years ago, contains evidence a newborn shark emerged from an estuarine pupping ground and devoured an unsuspecting newborn turtle.
05 November 2013, 07:26 AM ET
Millions of years ago, a dinosaur slipped and nearly fell while walking across a mudflat in what is now the Oklahoma panhandle. A record of this near 'oops' persists to this day in the form of some smudged footprints.
05 November 2013, 12:33 AM ET
Can new standards keep poisons out of pet foods?
04 November 2013, 05:00 PM ET
Camera traps captured these images of bay cats, a rare species found in Borneo, roaming through a logged area of rainforest where they weren't expected to be found.
04 November 2013, 03:01 PM ET
A previously unknown giant platypus species was discovered in an Australia fossil field, and suggests that the evolutionary history of the platypus is more complex than previously thought.
04 November 2013, 01:48 PM ET
After getting stung by a wasp, a European garden spider bites off its own leg in this video.
04 November 2013, 01:44 PM ET
Conservation has as much benefit for communities as it does for nature.
04 November 2013, 01:40 PM ET
Poaching and habitat loss may be putting elephants at risk of losing their culture — the learned behaviors that seem to be passed down through generations. And the trauma of separation and displacement can have lasting impacts akin to PTSD.
04 November 2013, 12:40 PM ET
Megalodon, the biggest shark that ever lived, seemed to get bigger over its evolutionary history. Its massive size may have made it more susceptible to extinction.
04 November 2013, 11:14 AM ET
Kidnapper ants raid the colonies of other ants and steal their young, taking them back to their own nests, where they enlarge their home, provide them food and raise their offspring.
04 November 2013, 10:01 AM ET
When carbon dioxide is absorbed by the ocean, the water's acid level rises. If this level gets too high, some sea creatures that build protective shells can't grow as fast or even have their shells dissolve, threatening the entire food chain.
04 November 2013, 07:42 AM ET
About 50 years after the first fossil teeth were found, scientists have finally described an extinct species of megamouth shark that prowled the oceans about 23 million years ago.
02 November 2013, 12:52 PM ET
The nesting colony of therizinosaurs contained at least 17 clutches of eggs, with eight eggs in each clutch. The finding suggests that the huge-clawed, birdlike dinos gathered communally to nest.
02 November 2013, 09:02 AM ET
There might be a link between fatherhood and urine spraying for mice. Male house mice that surpass their peers at marking their territory tend to have more offspring, according to a new study.
01 November 2013, 03:45 PM ET
Scientists debate impact of earthworm-triggered greenhouse gas emissions.
01 November 2013, 03:10 PM ET
The U.S. Senate passed a resolution to make Saturday (Nov. 2) National Bison Day, commemorating the historical, economic, ecological and cultural contributions of North America's largest land mammals.
01 November 2013, 02:12 PM ET
National Marine Sanctuaries were designed to protect marine life, but a new study reveals that human activity still threatens life within these protected zones
01 November 2013, 11:29 AM ET
A mosasaur, a toothy marine reptile of the Cretaceous period, was discovered with the fossilized remains of three other mosasaur species in its gut. The find reveals what was once a rich ecosystem off the African coast.
01 November 2013, 11:16 AM ET
Consumption of shark fin soup has decline by 50 to 70 percent in China over the last two years, according to an environmental group.
01 November 2013, 10:44 AM ET
A newly discovered species of leaf beetle uses its own feces to modify shelters in leaves.
01 November 2013, 10:42 AM ET
Using lasers, scientists can now surgically blast holes thinner than a human hair in the heads of live fruit flies, allowing researchers to see how the flies' brains work.
01 November 2013, 09:11 AM ET
Though they may look different, penguin mating behaviors are surprisingly similar to other birds. Even so, each of the 18 penguin species has its own little mating quirks, with some doing a look-see of the male's bachelor pad before shacking up.
01 November 2013, 07:59 AM ET
Scientists have successfully used lasers to make holes thinner than the width of a human hair in the heads of fruit flies, which lets them see and study what's happening in the flies' brains as the insects smelled different scents.
31 October 2013, 03:00 PM ET
Humpback whales feed on fish just off the seafloor, making them vulnerable to entanglement in seafloor fishing gear.
31 October 2013, 02:46 PM ET
Using lasers, scientists can now surgically blast holes thinner than a human hair in the heads of fruit flies, allowing them to gaze at how the rodents' brains worked while still alive.