Biology

While spiders can have up to eight eyes, daddy longlegs, which belong to a different order of arachnids called harvestmen, usually have just two eyes.

Daddy Longlegs Have Four Extra, Hidden Eyes, Researchers Say

The new discovery could help scientists unravel the mystery of how the arachnids evolved across some 537 million years

Beluga whales are one of five species of whale that undergo menopause. The new study finds that females in these five species live decades longer than females of similarly sized species.

Whales That Go Through Menopause Live Longer and May Help Care for Grandchildren

Alongside humans, five species of toothed whales are known to experience menopause. A new study suggests they evolved the trait to increase their lifespan

For rabbits and hares, females typically weigh more than males, according to a new study.

For Most Mammal Species, Males Actually Aren't Larger Than Females, Study Finds

New research upends a long-held theory that male mammals tend to be bigger than their female counterparts

The otherworldly form of the octopus has inspired millennia of fear and awe from humans.

Ten Wild Facts About Octopuses: They Have Three Hearts, Big Brains and Blue Blood

These bizarre creatures have been around for hundreds of millions of years, and for humans, they’ve inspired horror, admiration and culinary prestige

The researchers first observed cicadas urinating during a research trip to Peru.

Don't Look Up: Cicadas Produce High-Speed Jets of Urine

The noisy, winged insects produce pee the same way that much larger animals do, according to a new study

P. karlraubenheimeri lived during the Miocene Epoch roughly 8.8 million years ago.

Fossil Hunter Discovers Gigantic Crab in New Zealand—a New, Extinct Species

The massive creature is 8.8 million years old, and its modern descendants in Australia can grow to be the weight of a human toddler

A mutation in a gene called TBXT may be behind the loss of great apes' tails, according to a new study.

Why Don’t Humans Have Tails? An Old Genetic Mutation Could Explain Why Monkeys, but Not Apes, Have the Extra Appendage

Scientists have pinpointed a genetic change that might have led the ancestors of humans to lose their tails

Two green and black poison dart frogs

Why Do Poison Dart Frogs 'Tap Dance' With Their Toes? Research Sheds Light on Feeding Time Footwork

Scientists observed frogs tapping their toes up to 500 times per minute when prey was present, suggesting the behavior is related to predation

An orca hunting sea lion pups on an Argentinian beach in 2006. Before the recent study, killer whales had only been observed hunting white sharks in groups.

Single Orca Spotted Killing a Great White Shark for the First Time Ever

In less than two minutes, the marine mammal attacked a juvenile white shark and ripped out its liver in an encounter off the coast of South Africa last year

A Brazilian flea toad sits on a Brazilian real. The coin is 27 millimeters across.

The World's Smallest Vertebrate Is a Tiny Brazilian Frog, Study Finds

Adult male Brazilian flea toads are just over 7 millimeters long on average, and females measure about 8.15 millimeters

Weliton Menário Costa dances in "Kangaroo Time," his winning music video about kangaroo behavior research.

Watch This Year's 'Dance Your PhD' Contest Winner, a Musical Celebration of Kangaroo Behavior

“Kangaroo Time” took home the competition’s overall prize, while interpretive dances on early life adversity, circadian rhythms and streambank erosion were also honored

Because the fish are translucent and they lack skulls, they're a favorite research subject of neuroscientists.

This Tiny Fish Can Make Sounds That Rival an Airplane or an Elephant—Now, Scientists Know How

Transparent and just half an inch long, male Danionella cerebrum can make noises of more than 140 decibels

An adult humpback whale and calf. In the new study, the researchers blew air into the larynxes of three deceased whales, including a humpback, to learn how the the organ makes sound.

Scientists Discover How Some Whales Can Sing While Holding Their Breath Underwater

Baleen whales have evolved unique voice boxes essential for song, a new study finds—but these low-frequency vocalizations must compete with the noise of humans' ships

Mei Xiang and Tian Tian are two of the giant pandas who lived at the Smithsonian's National Zoo and Conservation Biology Institute in recent years. They were returned to China in November 2023.

More Giant Pandas Are Coming to the U.S. in a New Loan From China

China plans to send a male and a female panda to the San Diego Zoo as early as this summer, and negotiations are underway for pandas' possible return to the National Zoo in Washington, D.C.

Sandhill cranes fly over Nebraska's Platte River, where they gather each year during their spring migration, in 2009.

38,000 Sandhill Cranes Flock to Nebraska in a Record-Breaking Start to Spring Migration

Wildlife biologists counted the birds—likely lured by the region’s mild winter temperatures—during their first aerial survey of the season

The world's oldest living wild platypus (not pictured) is nearly 24 years old.

The World's Oldest Wild Platypus Shocks Scientists at 24 Years of Age

The animal was tagged in 2000, when it was estimated to be about one year old, and re-discovered alive in the wild last year

Charlotte, a round stingray, was determined to be pregnant, despite not having a male ray companion for at least eight years.

A Female Stingray That Hasn't Had a Mate in Eight Years Is Mysteriously Pregnant. Is a Shark the Father?

Though the round stingray, named Charlotte, shares her aquarium tank with two male sharks, experts say it is impossible for a shark to impregnate a ray

An etching of Darwin's study, commissioned a week after he died.

See What Charles Darwin Kept in His 'Insanely Eclectic' Personal Library, Revealed for the First Time

On the English naturalist's 215th birthday, more than 9,000 titles from his expansive collection are now accessible online

The 23 pairs of human chromosomes. People who inherit two tall X chromosomes (bottom right) are much more susceptible to autoimmune diseases than people with one X and one short Y chromosome.

Why Do Women Get More Autoimmune Diseases? Study of Mice Hints at Answers

Four in five people with an autoimmune disease are women. New research points to an RNA molecule involved in silencing one of their X chromosomes as a potential culprit

Ice worms spend most of the day burrowing their way through the cold, dark interior of the glacier, coming to the surface only in the afternoon to feed on algae and bacteria.

This Eight-Day Festival Celebrates One of Alaska's Weirdest Worms

Welcome to the Cordova Ice Worm Festival, a quirky local tradition honoring the mysterious creatures that live in glacial ice

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