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Animals

A European eel swims in the Baltic Sea. 

The Utterly Engrossing Search for the Origin of Eels

To save the endangered animals, researchers have been working for decades to figure out where they reproduce

An artist's renditon of the "alien goldfish." Scientists identified a toothy structure in the animal's gut, suggesting it was some kind of mollusk.

Mysterious ‘Alien Goldfish’ May Have Been a Mollusk

The bizarre creature’s anatomy had stumped scientists for decades

Donkeys are important pack animals that helped shape human civilizations.

Scientists Uncover the Story of Donkey Domestication

Humans tamed the equines about 7,000 years ago in East Africa, new research suggests

A bull walks in front of a cow. If they mate, the bull’s sperm will likely cluster together as they swim through the female’s reproductive organs.

Bull Sperm Get by With a Little Help From Their Friends

Traveling together helps the sperm navigate a tricky, sticky migration through a cow’s reproductive tract

Ants have several key roles in keeping their environments in balance, including aerating the soil, dispersing seeds, decomposing organic material and serving as a food source. 

An Estimated 20 Quadrillion Ants Live on Earth

The weight of the world’s ants exceeds that of all wild birds and mammals combined

A cheetah at Erindi Private Game Reserve in Namibia

Cheetahs Arrive in India After 70 Years of Local Extinction

As part of an ambitious reintroduction plan, conservationists flew in eight of the big cats from Namibia

Calli moves around on land.

Beloved Sea Lion at National Zoo Dies Unexpectedly

Calli, a 17-year-old California sea lion, is remembered by zoo staff as a good mother and ambassador for her species

Barnaby Domigan with the giant earthworm

Nine-Year-Old Finds a Three-Foot-Long Earthworm in His Backyard

The New Zealand boy named the creature “Dead Fred”

Fishers caught about 108 million pounds of lobster in 2021, valuing a record $725 million at the docks.

Lobsters Placed on ‘Red List,’ Angering Maine Fishing Community

Seafood Watch announced that consumers should avoid lobsters, because their traps threaten the endangered North Atlantic right whale

The chimpanzees only share their identity while traveling, which may help avoid confrontations.

Chimpanzees Play Their Own Signature Drumbeats to Stay in Touch

New research suggests the animals broadcast their identity and location to find each other while traveling

A Haast's eagle hunts moa.

How a Giant Eagle Once Came to Dominate New Zealand

Before the formidable bird went extinct, scientists say it likely hunted the flightless moa

Researchers tracked one moth for just under 56 miles, marking the longest distance an insect has been continuously tracked.

How Migrating Death’s-Head Hawkmoths Fly Along a Straight Path

No prior study had continuously monitored wild, nocturnal migrating insects

Immortal jellyfish (Turritopsis dohrnii) are smaller than the nail on your pinky finger.

‘Immortal Jellyfish’ Could Spur Discoveries About Human Aging

After reaching maturity, these deep-sea creatures can revert to a juvenile stage and repeat their life cycle

Lions in South Africa’s Greater Kruger National Park are feared by many different prey animals, which will run away as soon as they hear a lion growl.

How Animals Survive in a Savanna Full of Predators

Ecologists have documented a hierarchy of fear in the South African grassland, and the king of beasts is at the top

Indo-Pacific bottlenose dolphins off the coast of Western Australia

Male Dolphins Have (Lots of) Wingmen

To find a mate, male dolphins work together in complex social networks that dwarf those of any other animal, except humans, study finds

An epaulette shark in the South Pacific

This Shark Can Walk on Land to Survive Its Extreme Habitat

Epaulette sharks could help scientists understand how animals respond to harsh conditions, including those caused by climate change

A Jorō spider, which was the victim of sensationalized reporting in the U.S. earlier this year

Spider Slander Runs Rampant Online

Nearly half of news stories about spider bites contain misinformation, which experts say can hurt conservation efforts

Australia is home to roughly 200 million rabbits, which are not native to the country and damage crops and ecosystems. 

How Two Dozen Rabbits Started an Ecological Invasion in Australia

The country’s “most serious pests” can be traced to one shipment from England in 1859, study shows

A pod of orcas feeding in the Atlantic Ocean

Orcas Are Breaking Rudders Off Boats in Europe

These interactions around Spain and Portugal might be a trend among juveniles, scientists say

A new study suggests that dogs might produce tears of happiness when they're reunited with their owners after time apart. 

Do Dogs Really Cry Tears of Joy When Reunited With Their Owners?

Experts are divided about a new study suggesting dogs’ tears are associated with emotion

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