While testosterone plays a significant role in fetal development, it is not the only hormone that influences masculinization.

In Addition to Testosterone, Another Hormone Is Vital for Early Male Development

A hormone called androsterone, produced in the placenta and other organs, plays a role in fetal development in the womb

It was during another experiment in his lab that Naohiro Kato realized that microalgae might be a good ingredient for bioplastic.

Made From Microalgae, These Mardi Gras Beads Are Biodegradable

Louisiana State University molecular biologist Naohiro Kato is confronting plastic pollution one necklace and doubloon at a time

Due to their genetic and physiological similarities to humans, lab rodents have become the cornerstone of animal research.

The History of the Lab Rat Is Full of Scientific Triumphs and Ethical Quandaries

Lab rodents have been used in animal testing for more than 150 years, and the number of rodent-based studies continues to grow

Michelle Obama is the 14th consecutive First Lady to have a cattleya orchid named in her honor (above). Last year, the Melania Trump orchid was earning acclaim in the plant world.

Here’s How Horticulturalists Made the Michelle Obama Orchid

This year’s orchid show takes over the cavernous naturally-lit Kogod Courtyard with thousands on view

Plastic debris is providing a new vessel for potentially invasive species to cross large distances.

Sea Creatures Still Arriving in the U.S. on Plastic Debris From the Japanese Tsunami Eight Years Ago

Marine biologists don’t know how long different species can survive adrift in the open ocean, and some may become invasive when they reach new shores

The lowland streaked tenrec (Hemicentetes semispinosus) in Andasibe-Mantadia National Park, Madagascar.

Defensive Spines on Tenrecs Could Come at a Cost to Brain Size

The little mammals of Madagascar appear to have undergone an evolutionary tradeoff between brain size and defensive armor

American artist Georgia O'Keeffe poses outdoors beside an easel with a canvas from her series, 'Pelvis Series Red With Yellow,' Albuquerque, New Mexico, 1960.

Why Are Georgia O’Keeffe’s Paintings Breaking Out in Pimples?

A new handheld tool lets scientists diagnose the chemical reaction behind “art acne”—and learn how it can be prevented

An artist's concept of the Beresheet lunar lander on the moon.

Israel’s Private Lunar Lander Blasts Off for the Moon

The Israeli spacecraft Beresheet will gradually raise its orbit to reach the moon, landing after about a month and a half of flight

Botanist George Washington Carver, seen here in a 1940 photo, donated $33,000 in cash to the Tuskegee Institute to establish a fund to carry on the agricultural and chemical work he began.

In Search of George Washington Carver’s True Legacy

The famed agriculturalist deserves to be known for much more than peanuts

Computer technician Joyce Cade works on a UNIVAC computer at a United States Census Bureau installation in Maryland which was used to tabulate the results of the 1954 Census of Business.

Women’s Contributions to Early Genetics Studies Were Relegated to the Footnotes

While women scientists were frequently “acknowledged programmers” in population genetics research, few of them received full authorship

Lake Malawi formed in a valley where the African tectonic plate is the process of splitting in two.

The Fishy Mystery of Lake Malawi

In the second-largest lake in Africa, fish evolution is taking place at an explosive rate. Why? Scientists are diving into the question

A mosaic of Mars images captured by the Viking Orbiter 1, which operated around the planet from 1976 to 1980. Valles Marineris, the largest canyon in the solar system, cuts across middle of the planet, stretching over 3,000 km long and up to 8 km deep.

With Opportunity Lost, NASA Confronts the Tenuous Future of Mars Exploration

Following decades of continuous flights to Mars, NASA is facing a shortage of missions

This cylindrical vessel, known as the Case/Throat/Nozzle (CTN), is the portion of RocketMotorTwo donated to the museum. It is one of the only non-reusable components of SpaceShipTwo.

The Engine Powering the Future of Civilian Spaceflight Enters the Collections

SpaceShipTwo’s historic rocket motor lands at the National Air and Space Museum

Banksias, 2014

Art Meets Science

Dornith Doherty’s Mesmerizing Photos Capture the Contradictions of Seed Banking

“Archiving Eden,” now at the National Academy of Sciences, shows how guarding against an ecological catastrophe is both optimistic and pessimistic

A sculpture of Louise Arner Boyd alongside the subject herself. This bust is part of the Marin History Museum collection in Novata, California.

The Double Life of a California Socialite Who Became a Leading Arctic Explorer

In the early 20th century, Louise Arner Boyd lived as a philanthropist in the United States and a hero on the high seas

An artist's concept of the Mars Exploration Rover Opportunity superimposed on a photo of Victoria Crater, taken by the rover.

How NASA’s Opportunity Rover Made Mars Part of Earth

After more than 15 years exploring the surface of Mars, the Opportunity rover has finally roved its last leg

Authors and playwrights in 18th-century Europe helped make science accessible to the common reader.

How 18th-Century Writers Created the Genre of Popular Science

French writers such as Voltaire and Bernard le Bovier de Fontenelle helped shape the Enlightenment with stories of science

Though Charles Darwin is most famous for his voyage aboard the HMS Beagle and his theory of natural selection, the naturalist was, at heart, a botanist.

How a Love of Flowers Helped Charles Darwin Validate Natural Selection

Though his voyage to the Galapagos and his work with finches dominate the narrative of the famed naturalist, he was, at heart, a botanist

In 2018, the Chesapeake Bay Foundation published its midpoint assessment of the on-going restoration efforts for the country's largest estuary.

Checking In on the Health and Vigor of the Chesapeake Bay

As clean-up milestones are registered by a recent assessment of the nation’s largest estuary, a Smithsonian geographer drops in on the region

The stone circle Ring of Brodgar on the Orkney Islands, Scotland.

Europe’s Megalithic Monuments Originated in France and Spread by Sea Routes, New Study Suggests

The ancient burial structures, strikingly similar all across Europe and the mediterranean, have puzzled scientists and historians for centuries

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