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Saylor Flett, left, fans flames ignited by Jeff Greef. Air quality, weather and even bird migration affect when it’s safe to conduct a burn.

Planet Positive

Fighting Fire With Fire in California

How communities in the West are boldly setting property ablaze to reduce the impact of extreme wildfires

An artist’s reconstruction of Rhinesuchus, a rhinesuchid temnospondyl

Paleontologists Uncover Fossil Impressions of Giant, Alligator-Like Amphibians

The find reveals how the creatures swam and relaxed in prehistoric waterways

Archaeologists collect samples from a prehistoric caribou hunting site on Alpena-Amberley Ridge in Lake Huron.

America's Waterways: The Past, Present and Future

Clues to the Lives of North America's First Inhabitants Are Hidden Underwater

Submerged prehistory holds insights on the first humans to live in North America

Live oaks in Beaufort, South Carolina, photographed using an old-fashioned wet-plate process

The Live Oak Tree Has Withstood the Ravages of History

Majestic and sturdy, the icon of the American South has offered protection time and again

Several private companies are designing space stations that may eventually orbit Earth.

The ISS Will Fall From the Sky After the End of the Decade. What Will Replace It?

As NASA plans to retire the orbiting laboratory, these four privately owned and operated space stations are under development

Lego Caveman comes armed with a toy wooden club.

Did Our Ancestors Actually Wield Clubs?

Inspired by pop culture depictions of cavepeople, an archaeologist searches for what is real and what is a myth

This functional connectivity map, a kind of “fingerprint” of the brain, displays how different regions interact with each other in 12-year-olds. The map was constructed from resting-state MRIs, where participants were lying down and not completing a task. Larger red circles denote brain “nodes” with more connections.

The Future of Mental Health

Can a ‘Fingerprint’ of Your Brain Help Predict Disorders?

Using new medical imaging techniques, researchers are working to identify early signs of developmental disorders and mental illness

Many of the reptiles that thrived during the Triassic were crocodile relatives that dinosaurs would later mimic through evolutionary happenstance, such as Postosuchus (back) and Desmatosuchus (front).

Dinosaurs Were Evolutionary Copycats of These Long-Lost Look-Alikes

Before T. rex and ankylosaurus ruled the Earth, a host of similar Triassic reptiles reigned

Wandering albatross pair in courtship in South Georgia. Researchers have found some birds have bolder personalities than others.

Animal Personalities Can Trip Up Science

Individual behavior patterns may skew studies, but researchers have a solution to this problem

To collect a saliva sample, technicians instruct a person to tilt their head for two to five minutes and spit the accumulated saliva into a sterile tube. The saliva-filled tube is kept on ice and sent to the laboratory to test for the presence of biomarkers for cancer or other diseases.

Is Saliva the Next Frontier in Cancer Detection?

Scientists are finding tumor signals in spit that could be key to developing diagnostic tests for various types of cancer

The adaptive lighting cooked up by Camilla Rathsach and Mette Hvass would automatically adjust to the availability of moonlight, tweaking this church’s lighting automatically to balance visibility and darkness. This mock-up shows how the church would be lit under a full moon.

This Danish Church Is a Beacon for How to Protect Wildlife From Artificial Light

A proposed design looks to automatically adjust the exterior lighting on the Anholt Island building to the moonlight

A cockatoo uses a sharp stick to poke through a membrane before using a scoop to fish out the cashew inside the box.

Like Humans and Chimps, Cockatoos Can Use a Set of Tools to Get a Meal

In lab experiments, the brainy birds carried a stick and scooped with them to get at cashews kept in a box

The sun sets over the Susquehanna River in northern Pennsylvania.

America's Waterways: The Past, Present and Future

America's Waterways: The Past, Present and Future

In a series of articles, <em>Smithsonian</em> magazine highlights all that draws our eyes to our nation's fresh and coastal waters

A $25 million plan to uncover 1,100 feet of Jordan Creek and build three bridges is moving forward in Springfield, Missouri.

America's Waterways: The Past, Present and Future

How 'Daylighting' Buried Waterways Is Revitalizing Cities Across America

Urban centers are exhuming creeks and streams once covered up to control floodwater—and bringing life back in the process

Industrialization changed Italy&rsquo;s Bagnoli Bay. Analyzing the DNA that was trapped in sediment offers a record of what was lost&mdash;and a clue as to how to get it back.

DNA Buried in Sediment Helps Scientists Picture Past Ecosystems

Examining the evidence offers a way to look back at now damaged environments

A male (silver) and female (brown) common European adder meet prior to mating. Scientists are just beginning to understand female sexual anatomy in snakes.

Why Did Scientists Wait So Long to Study the Snake Clitoris?

The delay is representative of a major problem in biology: Female and intersex animals are understudied compared with their male counterparts

Adam Driver stars in the new movie 65.

What Earth Would Have Really Looked Like in Adam Driver's '65'

If you were to travel back in time you’d find a mix of the familiar and strange on our planet

The strategy an animal uses to track a scent depends upon a number of factors, including the animal&rsquo;s body shape and the amount of turbulence in the odor plume.

Scientists Are Trying to Figure Out How Animals Follow a Scent to Its Source

Uncovering the varied strategies that animals employ could help engineers develop robots that accomplish similar tasks

Many animals like corals release eggs and sperm into the water on just the right nights of the month.

How Lunar Cycles Guide the Spawning of Sea Creatures

Researchers are starting to understand the biological rhythms that sync worms and corals to phases of the moon

A just-hatched chick stands next to its egg.

Why Newborn Chicks Love Objects That Defy Gravity

A clever new study shows the cute critters will often scuttle toward a video of a rising ball

Smithsonian Channel

Preview thumbnail for video 'This Terrifying Worm Snatches Fish From The Ocean Floor

This Terrifying Worm Snatches Fish From The Ocean Floor

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Preview thumbnail for video 'How Many Pencils Can Be Made Out of a Factory Batch of Graphite?

How Many Pencils Can Be Made Out of a Factory Batch of Graphite?

Preview thumbnail for video 'The Impeller is a Vital Component on this Giant Ship

The Impeller is a Vital Component on this Giant Ship

Photo of the day

This is a Mun Gwang lake in South Korea. I took this shot on October 24 , 2021 early in the morning . This lake is created by cutting a stream at the foot of the mountain which closes the dam on one side . FOGGY LAKE