Animals

An artist's rendering of a feathered dinosuar in the snow. Feathers would have allowed dinosaurs, ancestors of birds, to trap their body heat in cold climates.

Some Dinosaurs Evolved to Be Warm-Blooded 180 Million Years Ago, Study Suggests

Researchers studied the geographic distribution of dinosaurs to draw conclusions about whether they could regulate their internal temperatures

A subpopulation of orcas in the Strait of Gibraltar (not pictured) have interacted with roughly 700 boats since 2020, causing five of the vessels to sink.

Orcas Sink 50-Foot Yacht Off the Coast of Morocco

The vessel's two passengers were evacuated onto an oil tanker in the Strait of Gibraltar. The incident marks the fifth vessel the mammals have sunk in recent years

An illustration of some of the underwater creatures that lived during the Ediacaran Period, roughly 635 million to 541 million years ago.

Earth's Magnetic Field Nearly Collapsed 600 Million Years Ago. Then, Weird and Complex Life Evolved

A new study suggests more solar radiation reached Earth while the magnetic field weakened, leading to a rise in oxygen that drove an explosion of multicellular organisms during the Ediacaran Period

Elephants use different greetings depending on whether the other animal is looking at them.

How Do Elephants Say Hello? Reunions Lead to Ear Flapping, Rumbling and Trunk Swinging in Greeting

New research explores how African savannah elephants use vocalizations, gestures and secretions when they meet up with companions

Human-caused biodiversity loss is a major factor that could contribute to more frequent and severe disease outbreaks, according to a new study.

Biodiversity Loss Increases the Risk of Disease Outbreaks, Analysis Suggests

Researchers found that human-caused environmental changes are driving the severity and prevalence of disease, putting people, animals and plants at risk

A mother Siphonops annulatus with newborn babies.

Inside the Wild Ways Many Creatures Make Milk

Mammals aren’t the only animals that provide nutritious secretions for their young

Male belugas were more likely than females to change the shape of their melons, or foreheads.

Belugas May Communicate by Changing the Shape of Their Squishy Foreheads

Scientists documented five different melon shapes among the marine mammals living in captivity: push, flat, lift, shake and press

Dice snakes feigned their own deaths with a variety of mechanisms, including filling their mouths with blood (shown right).

Dice Snakes Fake Their Own Deaths With Gory, Poop-Filled Theatrics

When attacked by a predator, the reptiles can play dead with convincing detail, employing blood and feces for the show

In the late 1960s, Bob Paine described the Pisaster sea star as a “keystone species” in Pacific Northwest tide pools. The concept has since taken on a life of its own.

Has the Term 'Keystone Species' Lost Its Meaning?

More than 50 years after Bob Paine’s experiment with starfish, hundreds of species have been pronounced “keystones” in their ecosystems

Sperm whales communicate by making clicks.

Scientists Discover a 'Phonetic Alphabet' Used by Sperm Whales, Moving One Step Closer to Decoding Their Chatter

Researchers used artificial intelligence to spot patterns in recordings of the marine mammals' vocalizations, uncovering the "building blocks of whale language"

A bat clings to the roof of an abandoned cellar—an unlikely but vital habitat type for Europe’s bats.

How a Fantastical Labyrinth Became a Crucial Habitat for Europe’s Bats

After scientists documented the flying mammals in the Piusa Sand Caves, dug by miners a century ago, conservationists strove to protect the vital habitat

More than 1,000 sea lions gathered at San Francisco's Pier 39 last week, marking the largest congregation of the marine mammals at the city's Fisherman's Wharf in about 15 years.

More Than 1,000 Sea Lions Gather at San Francisco's Pier 39, the Largest Group in 15 Years

The pinnipeds came to the area to feed on anchovies and herring as they prepare for breeding season

In more than 20 years of field research, Rakus is the first orangutan to be observed using a medicinal plant to treat wounds.

In a First, an Orangutan Healed His Own Wound Using a Known Medicinal Plant

The primate named Rakus chewed up yellow root and applied it to an open facial wound, closing the sore within days

To create mouse-rat "chimeras," researchers injected rat stem cells into mouse embryos that lacked some genes for brain development.

Researchers Breed Mice With Hybrid Brains Containing Cells From Rats

In one experiment, rat neurons helped mice restore their senses of smell—the first time any animal has perceived the world through the sensory hardware of another species

While penguins have feathers that shield their skin from radiation, their eyes remain unprotected. Increased ultraviolet radiation exposure could also have harmful effects for Antarctic organisms like seals, krill and plankton, per a new paper.

Antarctica's Ozone Hole Is Persisting Later Into the Year, Raising Concerns for Wildlife

As a result of the longer-lasting hole, harmful ultraviolet radiation is reaching Earth during a time when young penguins and seals are more vulnerable, scientists say

One of the loose zebras runs through a pasture before being recaptured. The zebra that is still on the loose was spotted on Monday.

Four Zebras Escape From Trailer on Washington State Highway—One Is Still on the Loose

The animals ran around residential areas before community members—including a former rodeo bullfighter—helped corral three of them

A moose moves through the forest.

How Should Colorado Handle Its Booming Moose Population?

Roughly 3,000 animals now roam the state's mountain ranges

Michael Sanchez initially thought the bird was black, but he later realized how colorful it was when he got home and started processing the photos.

Extremely Rare Blue Rock Thrush Spotted in Oregon Might Be the First Ever in the United States

Amateur photographer Michael Sanchez captured photos of the blue-and-chestnut bird on a beach—but he didn’t realize just how special the “mind-bending” encounter was, until later

Scientists are at odds about how intelligent T. rex was.

How Intelligent Was T. Rex? Scientists Suggest the Dinosaurs Were Like 'Smart, Giant Crocodiles'

A new paper refutes the idea that T. rex was as brainy as a baboon, furthering the debate on the extinct reptile's intellect

160 pilot whales, mainly adult females with several young calves, stranded themsleves in shallow waters on Thursday morning in Western Australia.

Rescuers Save 130 Beached Pilot Whales in Western Australia After Mass Stranding

An additional 29 whales died, officials reported last week, while the reason behind the stranding remains unknown

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