Animals

Scotty, the largest T. rex specimen on record, is on display at the Royal Saskatchewan Museum in Canada.

The Largest T. Rex Could Have Been 70 Percent Heavier Than Fossils Suggest

Two scientists used modeling to predict how big the giant carnivores could have really grown, making a point that fossils likely don't represent the largest or smallest individuals of a species

A jar containing Ascaris, a parasitic worm that affects over one billion people worldwide

Parasites Are Everywhere. Why Do So Few Researchers Study Them?

Aging parasitologists are working hard to inspire more students to enter the field

A coating of iron on Komodo dragons' teeth could help keep them sharp for tearing into prey, as well as protect them from digestive acids.

Komodo Dragons Have Iron-Coated Teeth, Study Finds

New research provides the first evidence of the adaptation in a carnivorous reptile, and it might hold clues to understanding the teeth of dinosaurs

A California condor chick rests in a clear container lined with paper at the L.A. Zoo.

A Record-Breaking 17 California Condor Chicks Hatched at the L.A. Zoo This Year

The successful breeding season offers more hope for the endangered species, which has come back from the brink of extinction due to captive breeding efforts

The pups helped spread the seeds of foxgloves, bluebells, common spotted orchids and other plants.

These Backpack-Wearing Dogs Have an Important Job to Do

The pups are dispersing seeds at an urban nature reserve—just like their wild wolf ancestors used to do before being hunted to extinction

An artist's impression of the shrew-like Krusatodon kirtlingtonensis, which a new study suggests lived long and matured slowly, in contrast to modern small mammals.

Two Rare Jurassic Skulls Could Help Unlock the Secrets of Mammals' Evolutionary Success

Fossils reveal a prehistoric, mouse-like creature matured slower and lived longer than similar mammals of today

An illustration of the taco-shaped Odaraia, which researchers say likely swam upside-down and trapped prey in its spine-covered legs.

Taco-Shaped Creature Had a 'Major Edge' in Evolution—and 30 Pairs of Spiny Legs

This shrimp-like arthropod was among the first to have a mandible, and it used a complex feeding mechanism during the Cambrian explosion, according to a new study

A rhesus macaque on Cayo Santiago, which is less than a mile east of Puerto Rico. Rhesus macaques spend upwards of 20 percent of their time engaged in cooperative behaviors like grooming.

How Do Animals Change Their Social Habits as They Age?

In patterns that may sound familiar, long-term studies reveal what elderly deer, sheep and macaques are up to in their twilight years

Dogs are highly attuned to the emotions of humans, according to the results of a new study about stress.

The Smell of Human Stress Leads Dogs to Make More Pessimistic Decisions, Study Suggests

Canines that smelled the sweat of anxious people were less likely to approach a bowl that might have contained food, indicating humans' emotions can affect dogs' behavior

Submerged under 50 feet of water off the coast of Wisconsin, the Margaret A. Muir has largely fallen apart. 

Shipwreck Found in Lake Michigan 130 Years After Sinking With Captain's 'Intelligent and Faithful' Dog Onboard

The captain said he would "rather lose any sum of money than to have the brute perish as he did"

The Brazilian sharpnose sharks were purchased from fishers between September 2021 and August 2023.

Thirteen Sharks Test Positive for Cocaine Off the Coast of Brazil

All of the wild Brazilian sharpnose sharks tested in a new study had the drug in their bodies, but many questions remain about cocaine's effects on aquatic creatures—and the humans who eat them

Two chimpanzees at the Budongo Conservation Field Station in Uganda

Chimpanzees Take Turns in Fast-Paced Conversations, Just Like Humans Do

A new study finds the average chimpanzee response time in gestured conversations is 120 milliseconds, which isn’t that far from the human average of 200 milliseconds

Nearly 1,000 birds died in a single night after flying into windows at McCormick Place Lakeside Center in October 2023.

Chicago Building Where Nearly 1,000 Birds Died in One Night Last Fall Installs Bird-Safe Window Film

The glass-covered lakefront convention center has long been known among wildlife advocacy groups as a site of mass casualties for migratory birds

A lesser flamingo feeds at Lake Bogoria, in Kenya.

How Will Climate Change Hurt Lesser Flamingos?

Their food supply in East African lakes could collapse as rains increase

Researchers experimented with venom from red spitting cobras (pictured here), as well as black-necked spitting cobras.

Common Blood Thinners Could Combat Snakebites, Preventing Tissue Damage and Amputations, Study Finds

An estimated 400,000 people per year are permanently disabled because of snake venom, which can cause lesions and necrosis at the bite site

A reconstruction of a giant armadillo in the collection of paleontology at the Museo de La Plata in Buenos Aires, Argentina

Was This Giant, Armadillo-Like Animal Butchered by Humans in Argentina 21,000 Years Ago?

The creature's bones show evidence of cutting with stone tools, adding to a series of findings that suggest humans were present in the Americas earlier than thought

Mango, Hilary Pecis, 2024

See Fetching Portraits of Man's Best Friend in a New Exhibition All About Dogs

"Dog Days of Summer" features artworks in a variety of styles made between 1915 and the present

Rattlesnakes have gotten a bad rap over the years, but a live stream of their attentive parenting behaviors could help change that.

Look Into a 'Mega Den' of 2,000 Slithering Rattlesnakes With This Live Stream in Colorado

Run by researchers at Cal Poly, the stream is part of a citizen science initiative that aims to change the public's perception of the much-maligned reptiles

The remains of whales that sink to the ocean floor become biological oases. Since 1977, scientists had only identified about 50 such whale falls across the world’s oceans, but a recent effort uncovered a startling density of them off the coast of Los Angeles.

Why Have So Many Whale Remains Been Found on the Ocean Floor Near Los Angeles?

Scientists have discovered more whale falls there than in the rest of the world combined

DOC ranger Jim Fyfe and Māori ranger Tūmai Cassidy walk alongside a cetacean, thought to be a rare spade-toothed whale, being transported by Trevor King Earthmoving.

The World's Rarest Whale May Have Just Washed Ashore in New Zealand

No one has ever recorded a live sighting of the spade-toothed whale, but experts say the dolphin-like creature found earlier this month is "no doubt" a member of the elusive species

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