Animals Archive
25 February 2015, 10:48 AM ET
An inebriated rat regains control of its coordination when the 'love hormone' oxytocin is infused through its brain.
25 February 2015, 06:55 AM ET
Giant reptiles wading into Triassic ocean waves left their tracks on the muddy floor. Scientists have now found a spike in these swim track fossils in the early Triassic — a surprising result they attribute to the previous mass extinction.
25 February 2015, 06:54 AM ET
Giant reptiles wading into Triassic ocean waves left their tracks on the muddy floor. Scientists have now found a spike in these swim track fossils in the early Triassic — a surprising result they attribute to the previous mass extinction.
24 February 2015, 07:14 PM ET
The fossilized remains of seven species of crocodile relatives were found along the banks of the Amazon River in Peru.
24 February 2015, 07:13 PM ET
Cosmeticians probably won't agree, but scientists say eyelashes have an optimal length: a third of the width of the eye.
24 February 2015, 07:02 PM ET
A peg-toothed crocodile relative with a mouth like a shovel lived in the prehistoric swamps of Peru about 13 million years ago, a new study finds.
24 February 2015, 11:20 AM ET
The ancestor to modern-day hippos lived in Africa about 28 million years ago and wasn't much bigger than a sheep, new research suggests.
24 February 2015, 11:00 AM ET
The ancestor to modern-day hippos lived in Africa about 28 million years ago and wasn't much bigger than a sheep, new research suggests.
23 February 2015, 03:33 PM ET
Microscopic bacteria thrive in seawater at the lowest point on Earth's surface, the Mariana Trench.
23 February 2015, 02:30 PM ET
Things are starting to look up for the rarest big cat on the planet.
23 February 2015, 01:00 PM ET
In 2007, there were only 30 Amur Leopards recorded in a census. This WWF video was captured in 2011 in Kedrovaya Pad Nature Reserve in the Russian Far East. A recent census show the population has jumped to 57.
20 February 2015, 10:07 PM ET
In most situations, lethal control makes little sense — financial or otherwise.
19 February 2015, 03:35 PM ET
Bottlenose dolphins moved into the Mediterranean, once too salty to harbor much marine life, at the end of the last ice age about 18,000 years ago, a new study finds.
19 February 2015, 02:06 PM ET
Animals tend to evolve toward a larger body size over time, and marine animals are no exception, a study suggests.
19 February 2015, 10:23 AM ET
Great white sharks may have an even more delayed adolescence than humans, not reaching sexual maturity until they are in their second and third decades, new research shows.
19 February 2015, 06:53 AM ET
In one of the first global species invasions, tropical fire ants spread worldwide by inadvertently hitching rides on 16th-century Spanish ships. Unknowingly, the Spanish were setting up quite a headache for future generations.
18 February 2015, 05:09 PM ET
For the first time in 150 years, researchers have found a new species of sea dragon, a marine creature with "unusual red coloration," according to a new study.
17 February 2015, 04:43 PM ET
Federal officials counted 109 wild Mexican wolves, or lobos, in the Southwest in 2014, up from 83 in 2013. It's the fifth year in a row the small population has grown in the United States.
17 February 2015, 01:35 PM ET
Despite their tuxedo style, when it comes to enjoying food, penguins have poor taste, a new study finds.
14 February 2015, 08:42 AM ET
Valentine's Day may inspire people to buy chocolates for their loved ones or treat their sweetheart to a romantic, candlelit dinner, but animals have entirely different courtship behaviors.
13 February 2015, 12:30 PM ET
DNA tests have confirmed that an endangered gray wolf killed in Utah in December was the same lone wolf that had been spotted and photographed near Arizona's Grand Canyon, the U.S. Fish and Wildlife Service announced this week.
13 February 2015, 08:47 AM ET
Hearts have become iconic symbols of Valentine's Day, but when it comes to hearts in the real world, one size doesn't fit all — particularly in the animal kingdom.
12 February 2015, 11:40 PM ET
While human culture and market experience may play a role in irrational decision-making, it now seems clear that choice biases are much more deeply rooted in our biology.
12 February 2015, 03:35 PM ET
Two new species of early mammals were discovered in China: a horny-clawed tree-dweller and a tunnel digger with shovel-like paws.
12 February 2015, 02:13 PM ET
Researchers have revealed the oldest tree-dwelling mammal ancestor and the earliest known burrowing mammalian. The amazing fossils were discovered in lake sediments in China and date back some 160 million years.
12 February 2015, 12:00 PM ET
Can your dog tell whether you are content or annoyed? Yes, according to new research.
10 February 2015, 07:36 PM ET
See "spot" run, see "spot" walk, see "spot" get kicked and keep on going. Boston Dynamics' newest addition weighs in at about 160 lbs. and uses its sensor head to navigate.
10 February 2015, 02:05 PM ET
Millions of years before LSD and rock and roll, dinosaurs munched on psychedelic fungus, a new study suggests.
07 February 2015, 08:42 AM ET
Killer shrimp, creatures that indiscriminately slay other animals without eating them, may soon join the list of invasive species living in the Great Lakes, a new study finds.
06 February 2015, 02:57 PM ET
The biggest rodent to ever live had large front teeth that it used the way elephants use their tusks, new research shows.
06 February 2015, 06:14 AM ET
In a first-of-its-kind case, a pair of conjoined lizards called Quince monitor lizards were discovered at a German zoo, according to a new report.
05 February 2015, 12:18 PM ET
n 2010, Frek (a Dutch chimp) has high pitched grunts compared to Lucy (an Edinburgh chimp). By 2013, the grunts of Frek and Lucy have become much more similar.