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Smart News / Smart News Science

About 50 Apennine brown bears live in central Italy.

After Living Alongside Humans for Millennia, These Italian Brown Bears Have Evolved to Become Less Aggressive

Researchers found genetic differences that likely resulted from humans killing aggressive bears, leaving docile individuals to breed and pass along their genes to offspring

Flat-headed cats are rarely observed in the wild, in part because of their nocturnal habits.

This Wild Cat Is Considered ‘Possibly Extinct’ in Thailand. Researchers Just Caught It on Camera for the First Time in About 30 Years

Findings from the largest-ever survey of endangered flat-headed cats may help change the species’ official conservation status in Thailand

Dark-eyed juncos are small sparrows found throughout North America.

These Urban Birds Evolved Longer Beaks During Covid-19 Lockdowns. Then, They Changed Back

Researchers suspect that dark-eyed juncos living in Los Angeles adapted based on the availability of food scraps tossed by humans

The researchers examined 3D reconstructions of hundreds of ant exoskeletons.

Some Ants Sacrifice Stronger Exoskeletons for Larger Colonies, Which May Help Them Take Over New Environments

Species with thinner protective barriers may need fewer resources and tend to have a greater ability to adapt to new habitats, a study suggests

Estrogen may cause certain colon cells, shown in green in this microscope image, to release a hormone called peptide YY. This, in turn, causes a different type of colon cell, colored magenta, to pump out the chemical messenger serotonin, which activates pain-sensing nerve fibers.

Women Are More Likely to Have Irritable Bowel Syndrome. This Newfound Gut Pain Pathway Might Explain Why

The hormone estrogen—which female animals typically have more of than males—triggers a molecular cascade in the gut that leads to pain signals, a study in mice suggests

An artistic representation of a superkilonova

In a First, Astronomers May Have Witnessed a Rare Double Explosion of a Star Called a Superkilonova

A massive star may have burst, leaving behind two dense, dead cores, which then collided and caused another explosion

New research suggests that swearing boosts physical performance by reducing inhibitions.

Need a Quick Boost in Physical Strength? Try Blurting Out Some Curse Words, a Study Suggests

When repeating four-letter words, participants held a challenging physical task for longer than when they said neutral words. Cursing seemed to help them feel more focused, more confident and less distracted

Michaela "Michi" Benthaus in the center with her five crewmates

This Aerospace Engineer Just Became the First Wheelchair User to Travel to Space

A brief commercial flight with space tourism company Blue Origin made Michaela “Michi” Benthaus’ childhood dream come true

Nanoflowers, which look white, can help healthy cells, colored yellow, deliver mitochondria, colored red, to nearby cells. 

A New Way to Boost the Powerhouses of the Cell Might Combat Aging and Degenerative Diseases, Lab Study Suggests

Creating mini mitochondria factories helped recharge damaged cells in a dish, providing proof-of-concept work that could pave the way to new regenerative medicine therapies

An artistic representation of exoplanet PSR J2322-2650b, on the left, and the pulsar it orbits, on the right

This Lemon-Shaped Planet Has an Atmosphere Unlike Anything Astronomers Have Ever Seen

The James Webb Space Telescope detected an atmosphere rich with carbon and helium, which is unexpected on this hot planet roughly 2,000 light-years from Earth

Researchers were surprised when they spotted an additional cub with this mother polar bear.

This Mama Polar Bear Adopted a Young Cub—and You Can Track the Family as They Wander Around the Hudson Bay

The rare event marks the 13th known instance of adoption within this well-studied group of polar bears living in the western Hudson Bay area

Morteratsch Glacier in Switzerland

How Many Glaciers Will Survive Until the End of the Century? These Four Scenarios Show It’s Not Looking Good

Researchers calculated every glacier’s lifespan and found that even at the most ambitious Paris Agreement goal, the planet would lose around half of its 200,000 glaciers by 2100

Six infrared images of Titan created with data from NASA's Cassini spacecraft

Saturn’s Moon Titan May Not Have an Underground Ocean After All

A new analysis of data from NASA’s Cassini spacecraft may upend Titan’s status as an ocean world. But it might still have pockets of water within a slushy ice layer

Ancient bees built nests in the hollows of rodent skulls, a new study suggests

Fossils Suggest That Some Ancient Burrowing Bees Made Their Homes in Rodent Skulls

While cleaning fossils retrieved from a cave on a Caribbean island, a researcher noticed something strange in the hollow tooth socket of a small skull

A female green hermit hummingbird

These Male Hummingbirds Evolved Straighter, Sharper Bills So They Could Better Joust for Mates

While female green hermit hummingbirds have curved bills, males’ straighter mouthparts are built for stabbing one another, a new study suggests

Magellanic penguins are easy prey for the large cats.

Pumas Are Snacking on Penguins in Argentina—and the Abundant Birds Are Changing the Prowling Cats’ Behavior

Mountain lions are adapting to their defenseless, predictable prey, which return to Patagonia seasonally to nest and breed, new research suggests

NASA’s Lucy spacecraft, which is investigating a group of asteroids that share Jupiter's orbit around the sun, snapped this image on September 16 as 3I/ATLAS approached Mars. 

Interstellar Comet 3I/ATLAS Is About to Make Its Closest Approach to Earth. Here’s How to View It With Binoculars or a Telescope

On December 19, avid skywatchers can catch a glimpse of the mysterious visitor through powerful binoculars or a telescope when it’s around 170 million miles from our home planet

The growth plates, known as specimens UAMN3760 and UAMN3724, were discovered near Fairbanks in the early 1950s.

Mysteriously Young ‘Mammoth’ Fossils Discovered in Alaska Turned Out to Be Whale Bones

When researchers learned the fossils were merely 1,900 to 2,700 years old—which would be the youngest woolly mammoth fossils ever found—they suspected something was amiss

A similar situation unfolded in January 2023, when a burrowing owl (pictured here) was found aboard Royal Caribbean International’s Symphony of the Seas.

These Owls Took a Free Vacation on a Cruise Ship—but Soon They’ll Be Heading Home

A pair of burrowing owls made themselves at home aboard Royal Caribbean International’s Allure of the Seas in February, joining a trans-Atlantic sailing to Spain. They’ll return to the United States next month

Illustration of a T lymphocyte white blood cell, depicted in blue, attacking a cancer cell, shown in red

Scientists Engineered Cancer-Fighting Cells Inside Patients’ Bodies—and Two Early Trials Show Promise

Two recent studies show the novel therapy works in people with multiple myeloma, but researchers are trying to minimize side effects

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