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Science / Human Behavior

A dead tree stands with its bare, white trunk and branches in contrast to the greenery around it.

What’s Killing These Oak Trees in the Midwest? Conservationists Believe Drifting Herbicides Are to Blame

When Illinois landowners noticed tree deaths and diseases on their properties ramp up in 2017, they suspected industrial agriculture. A survey found herbicides in 90 percent of tree tissues

A long-exposure view of the Milky Way, seen from Brandenburg, Germany, is cut through by the light trails of passing satellites.

Giant Mirrors in Space Could Bring Sunlight After Dark, One Startup Says—and Astronomers Are Concerned

Critics argue the satellites, billed as a way to harness solar energy at night, could hamper sky observations and may pose a threat to human and animal health

Smithsonian magazine's picks for the best books about science in 2025 include Replaceable You, Dinner With King Tut and North to the Future.

The Best Books of 2025

The Ten Best Science Books of 2025

From “experimental archaeology” to the mysterious appeal of exploration, the wide-ranging subjects detailed in these titles captivated Smithsonian magazine’s science contributors this year

A digital illustration of an HIV-infected T cell. Once infected, the immune cell is hijacked by the virus to produce and release many new viral particles before dying. As more T cells are destroyed, the immune system is progressively weakened.

New Trials Hint That ‘Functional Cure’ for HIV May Be Within Reach, Helping Some Patients Achieve Lasting Remission

People infected with HIV must take antiretroviral drugs for life. But engineered antibodies appeared to suppress the virus for certain participants in recent trials in Africa and Europe

Students learn anatomy from an Asclepius AI Table, which merges interactive elements and artificial intelligence.

Medical Students Are Learning Anatomy From Digital Cadavers. Can Technology Ever Replace Real Human Bodies?

From interactive diagrams to A.I. assistants, virtual tools are beginning to supplant physical dissections in some classrooms

New research strives to understand what happens in the brain at the transitions between sleeping and being awake.

At the Mysterious Boundary Between Waking Life and Sleep, What Happens in the Brain?

Neuroscientists studying the shifts between sleep and awareness are finding many liminal states, which could help explain the disorders that can result when sleep transitions go wrong

Chubby the macaw arrived with self-plucking injuries, which are typically caused by stress, boredom, anxiety or life changes. Chubby was 22 at the time of being photographed in 2025, and she has since been adopted.

The Nation’s Biggest Animal Sanctuary Operates Under a Mantra to ‘Save Them All.’ How Could That Be Controversial?

Best Friends Animal Society has a sprawling campus in the canyons of Utah, but its influence has grown to reach almost every shelter in the country

Hyper-realistic reconstructions of Australopithecus afarensis (Lucy foreground, Selam background) by Élisabeth Daynès in the National Museum’s “People and Their Ancestors” exhibition, Prague

Meeting Lucy: How a World-First European Exhibition Brought Visitors Face to Face With the Fossil That ‘Shrinks Time’

Two Australopithecus fossils named Lucy and Selam made a rare trip out of Ethiopia for a 60-day display at the National Museum in Prague

A camera trap image of El Jefe, a male jaguar who made international news as the only known jaguar in the United States.

How El Jefe, the Lone Arizona Jaguar Who Captivated a Nation in 2016, Became a ‘Rock Star’

Once called “America’s last jaguar,” the solitary male wandered across the southern border in 2011 and became the centerpiece of a campaign to protect habitat in the Santa Rita Mountains

Gloria Acevedo, a diver with the Sirenas de Oriente in Mexico, removes a fishing line from coral near Cozumel Island.

‘Ghost Gear,’ or Abandoned Fishing Equipment, Is Haunting the Oceans. Here’s How Conservationists Are Fighting Back

Discarded nets, lines and traps are a hazard to marine life and ecosystems around the world, but pioneering programs are tackling the problem creatively through education, prevention, ocean cleanups and recycling

Ian and Stuart Paton pose with their world record pumpkin, nicknamed Muggle. The pumpkin weighs 2,819.3 pounds.

The Giant Pumpkin World Record Just Crept Closer to 3,000 Pounds. Here’s How Science, Sweat and ‘Soul Crush’ Keep Growers Reaching for the Heaviest Fruit Possible

Twin brothers in the United Kingdom grew the biggest pumpkin ever documented, tipping the scales at 2,819.3 pounds

Horseshoe crabs evolved 445 million years ago and have been around for 1,500 times longer than Homo sapiens. It was not until the 20th century, however, that scientists discovered life-saving properties in their blood.

Horseshoe Crab Blood Has Long Helped Us Make Safe Medicines. Now, Alternatives That Spare the Ancient Creatures Might Be Breaking Through

An enzyme in the blue blood has been key to testing vaccines since the 1980s, raising concerns for the crabs’ population. But regulatory approval and new data are signaling the tide may be turning

The Pleiades, also known as the “Seven Sisters,” is an open star cluster in the constellation Taurus. Because of its visibility to the naked eye, it has appeared in literature and cultures across time.

A Brief and Amazing History of the Pleiades, Stars That Captivated Ancient Civilizations and Inspired Poets

Also known as the “Seven Sisters,” the striking cluster has long been used as an important seasonal marker and appears high in the night sky around Halloween

An aerial view of Altadena on March 11, 2025, shows surviving trees and new greenery amid homes destroyed in the Eaton Fire.

After the L.A. Fires, Locals Turn to Native Plants to Help Shield Homes From Flames and Clean Contaminated Soil

Scientists and community members in Altadena are testing ways that California species can assist efforts to rebuild

A dusky shark swims in the Mediterranean Sea off the coast of Hadera, Israel, where dusky sharks and sandbar sharks tend to gather.

Why Do Sharks Go Into Feeding Frenzies? A Case Study of a Recent, Unusual Attack on a Human Looks for Answers

After multiple dusky sharks killed a swimmer off Israel’s coast this year, scientists investigated what might have triggered the attack in hopes of preventing similar incidents

These six keel-billed toucans were discovered bound and sedated in June by U.S. Customs and Border Protection officials. The Wildlife Confiscations Network helped find experts at qualified facilities to care for the birds.

Once Smuggled Animals Are Rescued, Law Enforcement Officers Call Her

As coordinator of the Wildlife Confiscations Network, Mandy Fischer helps match trafficked animals—from alligators to jaguars to baby monkeys—with sanctuaries and care facilities

People with a rare form of epilepsy have reported feelings of bliss just before having a seizure. A French Swiss neurologist has pinned down where this “aura” originates in the brain in hopes that one day, that feeling might be reproduced non-invasively in others.

Some People Experience Blissful Ecstasy Right Before a Seizure. Could Understanding This Feeling Help Treat Depression?

A neurologist shares her thoughts and research about “ecstatic epilepsy” in a wide-ranging conversation on how we perceive the world—and create the world we perceive

Some people are genetically built to require less sleep than the rest of us.

Why Do Some People Thrive on So Little Sleep?

Short sleepers cruise by on four to six hours a night and don’t seem to suffer ill effects

The northern lights appear near Saskatoon in Saskatchewan, Canada, on May 11, 2024.

Missed the Auroras in May? Here’s How to See Them Next Time

Three veteran aurora chasers and a NASA scientist share everything you need to know to check these dazzling displays off your bucket list

Roger Federer hits a forehand shot at Wimbledon. The tennis great has called his racket an extension of his arm.

How Did Humans Evolve to Use Everyday Tools?

An anthropologist explains why we experience many objects, from tennis rackets to cars, as extensions of our bodies

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