Science

An Edmontosaurus herd grazes in a forest.

The Last Day of a Doomed Dinosaur

The young, eighteen-foot-long Edmontosaurus had no idea about his fate as he grazed in a forest

A male Philoponella prominens spider (top) mates with a female.

This Male Spider Catapults Itself Into the Air to Avoid Sexual Cannibalism

The arachnids propel themselves to safety at breakneck speeds after they’ve mated to avoid being eaten alive

A man receives a Covid-19 vaccine in Zimbabwe.

Covid-19

Should Traditional Vaccines Be Used in the Global Fight Against Covid?

Researcher Maria Elena Bottazzi says such vaccines may be key to protecting individuals in middle- and low-income countries

Since 2017 when the Smithsonian Institution launched its first Earth Optimism Summit, marine biologist Nancy Knowlton notes that positive change is happening. “The price of renewable energy is cheaper than ever, electric vehicles are finally on the verge of taking off, and the world seems ready to protect 30 percent of its lands and water,” she says.

A New Surge of Earth Optimism Takes Center Stage at This Year's Folklife Festival

The challenges are many, but evidence shows that positivity emboldens global conservation efforts

As the climate changes, polar bears are increasingly coming into contact with people.

Researchers Develop a 'Bear-Dar' That Warns Humans of Approaching Polar Bears

The artificial intelligence-powered radar system is needed as climate change brings the animals closer to towns

Replica plaquettes were placed next to a fire to see how ambient light made stone carvings of animals appear to move.

Ice Age Artists May Have Used Firelight to Animate Carvings

Researchers examined 15,000-year-old stone art and suggest the makers were inspired to show movement by dynamic lighting of the fireside environment

A view of a Palouse Falls in Palouse Falls State Park in Washington. Geologists believe massive floods carved out this canyon and others in the Scablands.

Devastating Ice Age Floods That Occurred in the Pacific Northwest Fascinate Scientists

The Scablands were formed by tremendous and rapid change, and may have something to teach us about geological processes on Mars

Visible in the entrance to their den are a mother black bear, who has been sedated, and her female cub. Scientists are watching to see how bears will tweak their hibernation habits as the climate warms.

Why Amazing Discoveries About Bear Hibernation May Help Improve Human Health

The creatures' annual protracted snoozes have much to tell us about the biology of mammals, ourselves included

Homo heidelbergensis, a species whose skull is pictured here, likely lived in regions that overlapped with Neanderthals in Europe and Homo sapiens in Africa—according to climate modeling results released this week.

How Did Climate Change Affect Ancient Humans?

Sophisticated climate models were paired with evidence from the archaeological record to reveal where ancient humans may have lived and evolved

Bon Ami Mine is located in Little Switzerland, North Carolina, about 50 miles northeast of Asheville.

Black Lights Turn This North Carolina Mine Into a Psychedelic Wonderland

The Bon Ami Mine’s deposits of the mineral hyalite glow fluorescent green under ultraviolet light

Geologic processes have led to changes in the water and gases released by mudpots, geysers and springs—like this one.

Five Big Changes Scientists Have Documented During Yellowstone National Park's 150-Year History

Scientists have monitored the region closely for generations, and these are some of the most dramatic shifts they've seen

This mural outside of an outfitter's office illustrates the snaking mouth of Mosquito Bay.

Puerto Rico

Puerto Rico's Bioluminescent Bays Are Brighter Than Ever

The nightly light shows have rebounded from Hurricane Maria's devastating blow

Cycads growing in Litchfield National Park in Australia.

Many of These Plants Older Than Dinosaurs Face Extinction

Cycads have changed a great deal since they first appeared around 280 million years ago, and habitat loss and illegal trade are now threats

To many people, Henrietta Lacks, painted by Kadir Nelson in 2017, symbolizes inequity in medicine. Lacks died from cervical cancer in 1951, but her tumor cells— used in research without her permission—would enable medical advances, including the polio vaccine.

Race in America

The Historical Roots of Racial Disparities in American Health Care

A new documentary from the Smithsonian Channel, 'The Color of Care,' produced by Oprah Winfrey, shines a light on medicine’s biases

An artists's take on the insect

The Quest to Find the World's Largest Bee

The rediscovery of Wallace’s giant bee uncovers disheartening truths about the tenuous fate of hidden insect species

One reader wonders how birds stay balanced on tree branches while they’re asleep.   

Ask Smithsonian

How Do Birds Stay Upright When They Are Sleeping?

You've got questions. We've got experts

Bald eagles are intensely social in spite of also being fierce predators. Some 500 live near the remote fishing port of Dutch Harbor, Alaska.

Planet Positive

The Bald Eagle's Soaring Return Shows That the U.S. Can Change for the Better

The true meaning of a national symbol

Biologists of the past often explained the vast spectrum of animal genitalia with "lock-and-key": the hypothesis that vaginas and penises had primarily evolved to fit into each other mechanically. Today, there is a growing appreciation for the myriad of forces acting on genitals.

Why Have Female Animals Evolved Such Wild Genitals?

From ducks to dolphins, females have developed sex organs that help them deter undesirable suitors and derive pleasure from non-reproductive behavior

Male Svalbard walruses cluster by the shore. Each weighs an average of about 3,000 pounds and is up to ten feet long.

Planet Positive

A Welcome Comeback for Norway's Walruses

A hunting ban has fostered the return of a nearly extinct species

Lions spritzed with the hormone oxytocin stayed closer together.

Planet Positive

Can Spraying Lions With the 'Love Hormone' Help Them Live Together?

Researchers administered oxytocin to captive animals, and preliminary results showed the big cats were less hostile towards strangers

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