Reproduction

When they're alarmed, blue-lined octopuses display iridescent blue rings on their arms to ward off approaching predators.

These Male Octopuses Use Venom to Subdue Female Mates—and Avoid Being Eaten After Sex

Scientists observed male blue-lined octopuses injecting tetrodotoxin into females, which rendered them immobile for mating

Scientists used fragments of the child's right forearm bone to date the skeletal remains.

Mysterious Skeleton of Child With Human and Neanderthal Traits Has Finally Been Dated by Archaeologists

Discovered in Portugal in 1998, the individual dubbed the “Lapedo Child” has long perplexed scientists, thanks to a curious mix of features

Mother polar bears spend months inside snowy dens with their cubs. Then, the family emerges together in the spring.

Rare Footage Shows Baby Polar Bears Emerging From Their Den in the Arctic

In a new study, researchers used remote cameras and data from GPS tracking collars to learn more about this vulnerable period in the early lives of these marine mammals

Shadow (left) and Jackie (right) are incubating three eggs for the second year in a row. Their nest is perched 145 feet off the ground in a Jeffrey pine near Big Bear Lake in Southern California.

Watch California's Internet-Famous Bald Eagles Tend to Three New Eggs, Expected to Hatch Soon

Last year, the mated pair Jackie and Shadow also incubated three eggs—but none of them hatched. This year's "pipping period," when chicks may break out of their shells, begins in early March

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The Truth About the Sex Lives of Dinosaurs

Fossils are providing more and more clues about how dinosaurs attracted one another and reproduced, which contributed to their remarkable ability to populate much of the Earth

Wisdom the Laysan albatross was banded with a red tag reading Z333 in 1956. She is now raising a newborn chick at the age of at least 74.

See the Adorable Video of Wisdom, the World's Oldest Wild Bird, Tending to Her New Chick at Age 74

First banded in 1956, the Laysan albatross has become a mother once again at Midway Atoll National Wildlife Refuge

Scientists found biofluorescence in most species of birds-of-paradise, including the emperor bird-of-paradise (Paradisaea guilielmi), shown here from the American Museum of Natural History's collection.

Birds-of-Paradise Glow to Attract Mates, Adding a Flashy Element to Their Impressive Courtship Displays

Scientists find that 82 percent of birds-of-paradise species show biofluorescence, often on their feathers, throat or inner mouth

Eastern gray kangaroo genetic material was used for the study, which produced embryos via IVF.

Scientists Produced the First Kangaroo Embryos Through IVF. They Could Be Key to Marsupial Conservation in Australia

With continued work in the future, the team hopes to promote live births of endangered marsupial species, including Tasmanian devils, koalas and northern hairy-nosed wombats

The swell shark pup at Louisiana's Shreveport Aquarium

Shark Pup Mysteriously Hatches in Aquarium Tank With Only Females. How Could This Birth Happen?

Experts say the case is either a rare form of asexual reproduction or an instance of (very) delayed fertilization

The Consumer Electronics Show (CES) 2025 took place in Las Vegas, Nevada, this week.

The Eight Coolest Inventions From the 2025 Consumer Electronics Show

A needle-free injection system, a bug-watching garden camera, a wearable that helps with memory lapses and more were unveiled at the annual Las Vegas trade show

A Surinam golden-eyed tree frog calls for a mate, puffing out its cheeks.

See 25 Incredible Images From the Wildlife Photographer of the Year Contest

Cast your vote for your favorite of the photographs, which are all contenders for the People’s Choice award, through January 29

More than 1,300 tiny snails were released into the wild after a captive breeding effort. One baby snail is shown here on a British five pence coin.

Once Feared Extinct, 1,329 Pea-Sized Snails Have Been Released on an Atlantic Island After Captive Breeding Effort

Goats, rodents and habitat loss threatened the snails on Deserta Grande Island, so the mollusks were reintroduced on a neighboring island that’s free of invasive species

Siberian tigers Boris and Svetlaya lounge together in the wild. Boris walked 120 miles to reunite with her after their release from a rehabilitation program.

Two Orphaned Siberian Tigers Reunite as Mates After a 120-Mile Trek Through Russian Wilderness

Conservationists hope the love story between Boris and Svetlaya might indicate a new, successful chapter in tiger repopulation efforts

More than 3,000 known dragonfly species exist.

14 Fun Facts About Dragonflies, From Their Lethal Hunting Prowess to Incredible Migratory Feats

The colorful insects can help humans by eating mosquitoes and will gather in mysterious swarms

This adult Partula tohiveana snail doesn't have a dot of UV-reflective paint on its shell, meaning it was born in the wild.

These Tiny Snails Are Breeding in the Wild for the First Time in 40 Years in French Polynesia

During a release of captive-bred snails in September, researchers discovered wild-born individuals from the Partula tohiveana species—which had been considered extinct in the wild—marking a huge milestone in a global effort to save them

Cloned black-footed ferret Antonia's kits at three weeks old, on July 9, 2024.

A Cloned Ferret Has Given Birth for the First Time in History, Marking a Win for Her Endangered Species

Antonia, a cloned black-footed ferret at the Smithsonian's National Zoo and Conservation Biology Institute, has produced two healthy offspring that will help build genetic diversity in their recovering population

Researchers are trying to "bring back" the thylacine, or Tasmanian tiger, a species that has not been officially recorded since 1936.

A 110-Year-Old Pickled Thylacine Head Helped Build the Most Complete Ancient Genome to Date, Says 'De-Extinction' Company

Colossal Biosciences reports it extracted DNA and RNA from the Tasmanian tiger specimen, a key step forward in its effort to create a modern proxy of the extinct species. Other scientists are calling for data to back up the claim

A researcher holds a juvenile queen conch. Adults can reach up to 12 inches in length.

Scientists Play Matchmaker for Beloved Sea Snails in the Florida Keys

To boost the iconic queen conch's population, researchers are relocating the heat-stressed creatures to cooler, deeper waters to help them find mates

DCPA is used on crops such as broccoli, Brussels sprouts, cabbage and onions.

'Dangerous' Pesticide That Could Harm Fetuses Is Pulled From the Market in Historic Move by EPA

Often used to kill weeds around crops, DCPA poses a health risk to the unborn babies of pregnant farmworkers, according to the agency

Fe (pictured with her mate) hatched two chicks this breeding season, bringing the total number of her known offspring to 42.

She's the Oldest Common Loon in the World. She Just Had Her 42nd Chick

Fe, who is at least 38 years old, initially rose to fame as one half of the "resident power couple" at Michigan's Seney National Wildlife Refuge

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