Mammals

The mammoth nursery turned graveyard was declared a National Monument in July 2015.

What Killed the Mammoths of Waco?

Sixty-six thousand years ago, this national monument was the site of a deadly catastrophe

Researcher Julien Louys holds the jaw bone of an ancient giant rat species discovered in East Timor (left) and the same bone from a modern rat (right)

Fossils Show Ancient Rats Were the Size of a Small Dog

And our ancient ancestors likely ate them

Weak Skeletons May Have Spelled the End for Mammoths

New results suggest that weak bones made the beasts more susceptible to human hunters

Scientists gather around the Yuka mammoth, which was so well-preserved in the permafrost its brain was mostly intact

Ice Age Cave Lion Cubs and a Look Back at Permafrost Mummies

A recent find in Siberia is the latest on a list of well-preserved Ice Age mammals

The team had a single day to uncover the massive mammoth's skeleton.

Michigan Farmer Stumbles on a Mammoth Skeleton

Paleontologists excavated the skeleton, prying the bones from the dark muck of the field

The fossils, encased in rock and sediment, were collected from marine rocks that date to around six million years ago before the Isthmus of Panama formed and a seaway connected the Atlantic and Pacific oceans.

New Species of Ancient Dolphin Shows How the Animals Moved From Seas to Rivers

The newly discovered fossil gives scientists a fresh glimpse into the evolution of ocean life

Once Again, Thousands of Walruses Have Been Forced Ashore in Alaska

When the animals can’t find sea ice to rest on, they haul themselves ashore in crowded masses

Corythomantis greeningi frogs carry potent venom in their pouts.

What’s the Difference Between Poisonous and Venomous Animals?

The first known venomous frogs, discovered in Brazil, raise some basic questions about toxic biology

Nabiré had a chronic problem with uterine cysts, and the one that killed her was inoperable.

Only Four Northern White Rhinos Are Left on Earth

One of the species' last females died this week

A mother rhino breastfeeding her baby

Why Mammals Have a Monopoly On Milk

It all started with an egg

Screen shot from "The Whale Warehouse - AudioVision Ep. 1" via Vimeo

In L.A. There’s a Warehouse Filled with Whale Bones

A video offers a tour of the Whale Warehouse, which holds a large part of the Natural History Museum of Los Angeles County's marine mammal collection

A Diana monkey, perhaps tuning in to the distress calls of fellow primates.

Monkeys Can Hack Each Other’s Grammar

Campbell’s monkeys add suffixes to alarm calls to indicate specific threats, and Diana monkeys tune in for their own benefit

A giant rice rat specimen from the National Museum of Natural History in Paris, France

How Settlers Wiped Out the Caribbean’s Rodents of Unusual Size

The eradication of rice rats in the Lesser Antilles was part of a massive mammal extinction event

The oceans are teeming with tetrapods—“four-legged” birds, reptiles, mammals and amphibians—that have repeatedly transitioned from the land to the sea, adapting their legs into fins.

Take a Deep Dive Into The Reasons Land Animals Moved to the Seas

Synthesizing decades of discoveries, scientists have revealed links between changing environments and animal movements

Determine Your Ideal Eyelash Length With Science

How the “one-third rule” protects your eyes

Starving Sea Lions Are Piling Up on California Beaches

It's the third year of a crisis that's confusing scientists

The western tarsier, a rare primate species, has lost large amounts of its Borneo habitat to logging. More of that habitat is likely to disappear because of climate change.

Borneo's Mammals Face a Deadly Mix of Logging and Climate Change

But adding small amounts of land to already protected areas could help save the island's biodiversity

Pacific bluefin tuna populations have declined by up to 33 percent over the last 20 years.

300+ Species Just Joined the List of Threatened Plants And Animals

Overfishing, overhunting and habitat loss drove many of the new additions

Chacma baboons (Papio ursinus) fight. Infanticide in baboons is driven by a mating structure built on male competition.

Why Some Mammals Kill Babies of Their Own Kind

Male mammals that commit infanticide developed the behavior in response to their species' mating style

The skeleton was discovered near the American Falls dam and reservoir in Idaho.

What Appears to Be a Complete Mammoth Skeleton Was Discovered in an Idaho Ditch

A nearby reservoir has just covered the fossil in water, however, postponing the excavation

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