Aquatic mammals such as whales and dolphins live and feed in the ocean. The Blue Whale is the biggest mammal on Earth.
Baby Bats Babble With Moms, Hinting at Human Language Development
Fruit Bats Are the Best Pollinators (and Suppliers of Tequila)
Brazilian Free-tailed Bats Are Way Faster Than We Thought
Alaska's Kodiak Bear Is One of the Planet's Biggest
What's the Difference Between a Brown Bear and a Black Bear?
How Polar Bears Work
Gray Wolves Will Get Federal Protection Again in Much of U.S.
The Serval Stands Tall and Jumps Like A Champion
Are Dingoes Dangerous (and Did One Really Eat a Baby)?
Dik-dik: The Tiny Antelope With the Embarrassing Name
Are Mules, Burros and Jackasses All Donkeys?
Tapir: The Ancient Fruitarian With the Tiny Trunk
What's It Like Inside a Kangaroo's Pouch?
Do Kangaroos Really Box?
The Smiley Quokka Is an Australian Super Survivor
The Tarsier Is One Weird Primate, and Yes, We're Related
Marmosets Are Tiny, Upper Canopy-dwelling Monkeys
Why Do Gorillas Beat Their Chests?
How Long Do Squirrels Live?
'Splooting': It's What All the Cool Squirrels Are Doing This Summer
Squirrels Get Jacked During Hibernation; No Weights Needed!
World's Largest Wolves by Weight: The Mighty and the At-Risk
The Pink Fairy Armadillo Is as Mystifying as Its Name
The Coatimundi Is Cute But Doesn't Make a Good Pet
The adorable vaquita, the world's smallest porpoise and rarest marine mammal, has been pushed to virtual extinction by greed and fishing nets.
By Katie Carman
Humpback whales can be as long as a city bus and weigh as much as two. They love to breach and water slap with their fins and tails, making them a perennial favorite for whale watchers.
By Katie Carman
Sperm whales are one of the largest creatures in the ocean. And they have the biggest brain on the planet. So are they also the smartest? We'll tell you.
By Wendy Bowman
Their mamas may be the only ones who can tell them apart, but there are major differences between these cousins, one being the type of water in which they can survive.
Do humpback whales get tired of singing the same old song, or do they simply start over when it gets too complicated?
A dolphin named Billie learned a dolphin-show trick from some captive dolphins, taught her wild friends how to do it and started a fad.
The platypus may look a bit absurd and bizarre, but its milk might hold the secret to fighting antibiotic-resistant bacteria.
Thanks to the excesses of narcoterrorist Pablo Escobar, Colombian waterways now house a population of these invasive African giants.
It's the first evidence researchers have of the whales using their "unicorn horns" to capture prey.
It turns out that one of the world's most enchanting animals has even stronger superpowers than we previously knew. Surprise!
Whether you're sleeping on a water bed or napping during a rainstorm, water has a calming effect. Walruses also make use of soothing waves, but why don't they drown when catching submerged shut-eye?