Mammals
These Prehistoric Dolphins Had Tusk-Like Teeth
The animals likely thrashed their heads back and forth to injure or stun prey with their unusual, horizontal teeth
First Rabid Moose Recorded in Alaska Was Stumbling Through a Town
The large mammal likely contracted the virus from a fox, say wildlife officials
The Race to Save Florida’s Manatees
Researchers are nurturing sick and injured animals back to health while working to protect natural springs and curb seagrass decline
Woman Finds Mastodon Tooth on California Beach
The photos she shared set off a search for the fossil, which she had left behind. Now, scientists have the tooth, just the third of its kind found locally
Rare Wolverine Spotted in California—the Second in 101 Years
The elusive creatures disappeared from the Golden State in 1922
Climate Change Is a Wake-Up Call for Hibernating Squirrels
As spring arrives sooner, female Arctic ground squirrels are emerging from their burrows earlier, according to a new study
See the Rare Albino Echidna Spotted in Australia
Dubbed Raffie, the egg-laying mammal is an unusual color and "beautiful"
How the U.S. Almost Became a Nation of Hippo Ranchers
In 1910, a failed House bill sought to increase the availability of low-cost meat by importing hippopotamuses that would be killed to make "lake cow bacon"
During the 'Great Dying,' This Saber-Toothed Predator Reigned
This ancestor of mammals briefly thrived amid a massive extinction event, hinting at how carnivores may respond to climate change today
Orcas Are Ramming Into Ships Off Europe's Coast
One researcher says this may be a response to a "critical moment of agony" a female orca experienced with a boat
Did Lions Live in Ancient Greece? And More Questions From Our Readers
You’ve got questions. We’ve got experts
Platypuses Return to Australia's Oldest National Park
The egg-laying mammals haven't been seen at the site since the 1970s, but scientists hope the newly released creatures can re-establish a population
Male Woolly Mammoths Had Testosterone-Fueled Aggressive Episodes
By studying preserved tusks, scientists suggest the mammals experienced a yearly condition known as musth, like male elephants do today
Watch Whales Exfoliate Their Skin on the Ocean Floor
Migrating humpbacks used sand and rubble to slough off dead skin and barnacles, a behavior that may be both practical and social
Why Male California Sea Lions Are Getting Bigger
The “raccoons of the sea” have varied diets, allowing them to grow large to compete for mates
Balto's DNA Provides a New Look at the Intrepid Sled Dog
Scientists sequenced the famous canine's genome as part of a larger project studying the genes of 240 mammal species
Elephant Seals Take Extreme Power Naps in the Open Ocean
While foraging on deep dives, the marine mammals sleep for about two hours per day in short, ten-minute bursts
After Dinosaurs Went Extinct, These Ten Giant Creatures Roamed the Earth
Though we often think of the “terrible lizards” as behemoths, many later reptiles and mammals also grew to massive sizes
This Tiny Hawaiian Island Is Free of Invasive Rats
Now scientists are trying to coax back lost seabird colonies
Paleontologists Discover 52-Million-Year-Old Bat
The fossil represents the earliest-known species of the flying mammal
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