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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

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

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

At&nbsp;Ehrman Crest Elementary and Middle School, K-6 students are benefiting from an unusual collaboration.

Is This Elementary School Near Pittsburgh the Future of Education?

Ehrman Crest Elementary and Middle School is an innovative blend of children’s museum and classroom

Large-scale production of green hydrogen is seen as an alternative to the use of fossil fuels in the coming decades. Latin America is well-positioned to play a large part in this new industry and already has several projects in the works.

Can Green Hydrogen Help Power Latin America?

In anticipation of future demand, several projects are underway in the region to produce this clean energy source

Wesley Miles, a Pima archaeologist, points out that the placement of this new canal parallel to a prehistoric channel &ldquo;says something about our ancestors&rsquo; engineering skills.&rdquo;

America's Waterways: The Past, Present and Future

This Native American Tribe Is Taking Back Its Water

With a new state-of-the-art irrigation project, Arizona’s Pima Indians are transforming their land into what it once was: the granary of the Southwest

Whales are tricky to see from a satellite. Belugas, with their light skin standing out against the water, are a bit easier to spot.

Can Satellites Really Detect Whales From Space?

Distant identification of whales is improving rapidly, but finding the behemoth creatures is still surprisingly tricky

A revolutionary new tool, a collaboration between the Smithsonian Astrophysical Observatory and NASA, will monitor the chemistry and changing dynamics of major pollutants (above: an Arizona power generating station).

This Eye in the Sky Promises Major Insights Into the Air We Breathe

Launching in April, the satellite mission TEMPO will detect pollutants at a neighborhood scale across the nation

The cabbage soup diet of the 1950s allowed the indulgence in as much cabbage soup as one could consume.

The Seesawing History of Fad Diets

Since dieting began in the 1830s, the ever-changing nutritional advice has skimped on science

&ldquo;When an individual walks through this experience, they are a part of history, and now they can contribute to the future,&rdquo; says the museum&#39;s Asantewa Boakyewa.

This Show Is Everything You Need for a Year of Meaningful Community Activism

The immersive exhibition, "The Utopia Project," at the Anacostia Community Museum is about setting high goals and the means for achieving them

Fall/Winter Sears catalog from 1957

Before Folding 30 Years Ago, the Sears Catalog Sold Some Surprising Products

The retail giant’s mail-order business reigned supreme for more than a century, offering everything from quack cures to ready-to-build homes

The new solar panels would filter light more efficiently.

Farmers May Not Have to Choose Between Crops and Solar Panels

With a new photovoltaic panel, researchers harness sunshine to harvest energy and food together, taking advantage of the full light spectrum

Debra Babalola and Shefali Bohra invented Dotplot, a device that can help users monitor their breast health.

A New Tool Could Help Detect Breast Cancer Earlier

Dotplot gives users real-time feedback and builds a personalized map of their chests

Banff Sunshine has pioneered snow farming, which involves setting up miles of fencing across its highest terrain to capture large amounts of wind-blown, natural snow.

This Canadian Ski Area Doesn't Make Snow—It Farms It

Sunshine Village Ski Resort in Alberta is in the perfect position for piling up powder

On January 9, 2023, Spanish aeronautic engineer Juan de la Cierva became the first person to fly an autogiro.

How Quixote’s Windmills Inspired a Spanish Inventor to Envision Vertical Flight

The autogiro finds new fans a century after its first liftoff

Examples of computing hardware architecture supporting an AR and IR environment inside a car of the near future are displayed at the Valeo booth at CES 2023 in Las Vegas.

Eight Cool New Technologies From This Year's Consumer Electronics Show

Flying cars, live-translation eyeglasses, self-driving strollers and more were unveiled at the annual trade show in Las Vegas

Steve Galchutt shows off the custom-made low-wattage transmitter he uses on his treks.

Looking to Ditch Twitter? Morse Code Is Back

Reviving a 200-year-old system, enthusiasts are putting the digit back in digital communication

A copy of a Greek inscription, made by laying wet paper or plaster over carved stone to create a mirror-image impression.

How an Unorthodox Scholar Uses Technology to Expose Biblical Forgeries

Deciphering ancient texts with modern tools, Michael Langlois challenges what we know about the Dead Sea Scrolls

Smithsonian Channel

Preview thumbnail for video 'Making the Perfect Cup of Tea is More Science than Art

Making the Perfect Cup of Tea is More Science than Art

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Preview thumbnail for video ' A Traditional Cretan Cheesemaker Reveals His Secrets

 A Traditional Cretan Cheesemaker Reveals His Secrets

Preview thumbnail for video 'Destroying the Dnieper Dam Sent a Strong Message to the Nazis

Destroying the Dnieper Dam Sent a Strong Message to the Nazis

Photo of the day

Bohar Snappers aggregate in massive schools for mating every summer in Ras Mohammed National Park in the Egyptian Red Sea. As this school grew and moved around, at one moment in time, they appeared to take the shape of a dragon, opening its mouth and facing the diver photographer. Whether the dragon smiled or frowned to the human, we will never know. Diver and Dragon