Skip to main content

Subscribe to Smithsonian magazine and get a FREE tote.

Animals

Mosasaurus was among the largest and last of the sea-dwelling mosasaurs.

Giant Sea Lizards Ruled the Waves While T. Rex Roamed on Land

A new fossil discovery shows marine reptiles called mosasaurs lived up until the asteroid impact that killed non-avian dinosaurs

Spider silk is more than just a web for snaring prey.

Fourteen Ways That Spiders Use Their Silk

From making parachutes to building scuba tanks, the arachnids have come up with some fascinating creations

Hermit crabs are essential scavengers in the ocean. They may crawl into discarded tires looking for food or shelter, and become trapped and die of starvation.

Discarded Tires Are ‘Ghost Fishing’ Hermit Crabs

New research suggests these shell-swapping crustaceans are vulnerable to becoming trapped inside human debris

Not just food: Plant chemicals within nectar yield honey that packs a pharmaceutical punch and helps keep bees healthy.

Honey Has Numerous Health Benefits for Bees

From pesticide detox to increased longevity, the pros of the sweet stuff go well beyond simply nourishing the hardworking insects in the hive

Using micro-CT scans, the team visualized the crab's body in 3-D and even imaged its mouthparts lined with fine hairs. It is unknown if the five-millimeter-long crab is a full-grown adult, a juvenile or a baby.

This Tiny Crustacean Trapped in Amber Tells a Different Story About Crab Evolution

The Cretaceous-era fossil suggests that crabs left the sea some 50 million years earlier than scientists previously thought

For the first time in 16 years, a pair of golden-headed lion tamarins were born on the morning of October 7, 2021. New mom Lola carries the new infants on her back and cradles them close to her body. 

Zoo’s Historic Newborn Tamarin Twins Cling to Mom, Doing What Healthy Babies Do

Keepers worked with breeding parents Lola and Coco, who soon “become very interested in each other”

More than half of koalas admitted to Australia Zoo Wildlife Hospital are sick with chlamydia. 

Australia Begins Vaccinating Hundreds of Koalas Against Chlamydia in New Trial

The infection affects at least half of koalas living in southeast Queensland and New South Wales

Melting sea ice because of climate change forces walruses to congregate on land instead of ice.

Researchers Need Volunteer ‘Walrus Detectives’ to Help Count the Animals in Satellite Images

The project aims to quantify the impact of climate change on the species

Every summer, brown bears descend on Brooks River to pack on the pounds needed to survive their winter hibernation. 

Meet the Bodaciously Bulky Bears of Fat Bear Week 2021

The annual tournament celebrates Alaska’s chunkiest brown bears and their summer-long salmon feast

This year's overall winner Laurent Ballesta spent more than 3,000 hours trying to capture his stunning undersea image of mating groupers.

Ten Breathtaking Images From the 2021 Nature Wildlife Photographer of the Year Awards

The annual awards tell the story of our planet’s creatures and the threats they face

A gharial has the same skull shape as some extinct crocodiles. This skull shape has likely evolved three different times during the history of crocodiles.

Modern Crocodiles Are Evolving at a Rapid Rate

Despite their reputation as “living fossils,” crocodiles have changed dramatically in the last two million years

Plastic debris covers much of the sand on Henderson Island.

Plastics Make Beaches Hotter During the Day and Colder at Night

A study of remote islands shows that debris alters sand temperatures

Some conservationists have held out hope for species like the ivory-billed woodpecker, which was last spotted in 1944.

Ivory-Billed Woodpecker and 22 Other Species Declared Extinct

Many organisms included in the latest declaration were feared to be lost long before the Endangered Species Act of 1973 was first passed

Killer whales are among the oceans’ top predators. But in Iceland, pilot whales have them running scared.

Why Do Pilot Whales Chase Killer Whales Near Iceland?

Scientists are working to understand the strange inter-cetacean conflict

A green turtle surrounded by glassfish in Ningaloo Reef, Western Australia. Green sea turtles, which are classified as endangered, migrate long distances between feeding grounds and the beaches from where they hatched.

See Stunning Undersea Images That Showcase Our Blue Planet

From reef sharks to bioluminescent squid, the Ocean Photography Award highlights the wonders and perils of life in the sea

A researcher holds a banded vampire bat.

Vampire Bats Call Out to Friends to Share Blood Meals

After they prep bite sites to lap the blood out of live cows, females invite their roostmates to join them

Scientists analyzed millions of eBird observations to see how bird abundance changed during the early months of the pandemic.

Birds Flocked to Pandemic-Silenced Cities

From ruby-throated hummingbirds to bald eagles, a new study finds our feathered friends thrived in quieter urban habitats

Scientists first spotted the tracks, including this one from a calf, after storms in 2020 swept away several feet of sand in Spain.

Fossilized Footprints Reveal an Ancient Elephant Nursery in Spain

Straight-tusked elephants as young as two months old trampled around the area with their mothers

A diver swims over a bleached section of the Great Barrier Reef near Heron Island.

The Planet Has Lost Half of Its Coral Reefs Since 1950

A new study finds dramatic declines in coral reef cover, biodiversity and fish abundance

Despite heavy erosion, the camels remain visible some seven millennia after their creation.

Life-Size Camel Sculptures in Saudi Arabia Are Older Than Stonehenge, Pyramids of Giza

New research suggests the animal reliefs date to between 7,000 and 8,000 years ago

Page 82 of 226