One way of distinguishing these zebras from one another? Their stripes

The High-Tech, Humane Ways Biologists Can Identify Individual Animals

Humans have driver’s licenses and fingerprints, but cows have nose-prints and zebras have “StripeCodes”

Keepers suspect that the mother might already be pregnant with a second.

Is That Wallaby Sprouting a Second Head?

Last week, the first baby wallaby to be born at the Smithsonian’s National Zoo in three decades poked its head out of its mother’s pouch

The Cambrian Period was a time of remarkable diversification of life when many of the animal groups that exist today first appear in the fossil record.

Fossil Treasure Trove of Ancient Animals Unearthed in China

The fossils from the Cambrian Period include dozens of new species and provide a window into life more than 500 million years ago

Despite statistical methods that help sports fans improve their brackets, the probability of a perfect bracket remains something of a mystery in mathematics.

The Mathematical Madness Behind a Perfect N.C.A.A. Basketball Bracket

Picking a perfect bracket is so unlikely that it will almost certainly never occur, even if March Madness continues for billions of years

Dragons in Chinese art represent the emperor.

What Do Dragons Symbolize and More Questions From Our Readers

You asked, we answered

In a feat of surgical skill, Denton Cooley attached the temporary artificial heart device in only 47 minutes.

The Rivalry Between Two Doctors to Implant the First Artificial Heart

Featuring titans of Texas medicine, the race was on to develop the cutting-edge technology

The Holy Fire at Lake Elsinore, California, when only about five percent of the fire was contained, August 9, 2018.

Untangling the Physics Behind Drifting Embers, ‘Firenadoes’ and Other Wildfire Phenomena

Fires can leap rapidly from building to building and even cause extreme weather events such as pyrocumulonimbus storm clouds

Fingerprinting became widespread in the early 20th century.

The Myth of Fingerprints

Police today increasingly embrace DNA tests as the ultimate crime-fighting tool. They once felt the same way about fingerprinting

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Smithsonian Voices

The Dr. Is In: Cat-loving Paleontologist Answers Your Questions in New YouTube Series

Paleontologist Hans Sues answers your questions about dinosaurs, humans and cats in the Smithsonian’s new YouTube series, “The Dr. Is In.”

Exterior view of the entrance of Fa-Hien Lena cave in Sri Lanka, where archaeological evidence suggests humans lived about 45,000 years ago.

Ancient Monkey Bone Tools Shake Up the Narrative of Early Human Migration to the Rain Forest

New evidence pushes back the date for human settlement in jungles, challenging the idea that our ancestors preferred the savannas and plains

As humans began eating softer foods, overbites may have become more common and pronounced.

The Ability to Pronounce ‘F’ and ‘V’ Sounds Might Have Evolved Along With Diet

As our ancestors began eating softer agricultural foods, the shape of the human jaw and the sounds we make may have changed as well

Margaret Hamilton stands next to a stack of program listings from the Apollo Guidance Computer in a photograph taken in 1969.

Women Who Shaped History

Margaret Hamilton Led the NASA Software Team That Landed Astronauts on the Moon

Apollo’s successful computing software was optimized to deal with unknown problems and to interrupt one task to take on a more important one

A drinking horn made from the horn of an aurochs bull.

Testing the DNA in Museum Artifacts Can Unlock New Natural History, but Is it Worth the Potential Damage?

Museums house a wealth of rare animal specimens, such as arctic clothing, medieval parchment and Viking drinking horns, but DNA testing can be destructive

In theory, all you’d need to do is give a blood sample and his test would indicate whether you have allergies to a certain substance or not.

Teen Inventor Designs Noninvasive Allergy Screen Using Genetics and Machine Learning

Seventeen-year-old Ayush Alag is one of 40 finalists in this year’s Regeneron Science Talent Search

An ultraviolet image of the Andromeda galaxy, the closest major galaxy to the Milky Way, taken by NASA's Galaxy Evolution Explorer space telescope. Like our own galaxy, Andromeda is a spiral galaxy with a flat rotating disk of stars and gas and a concentrated bulge of stars at the center.

Streams of Stars Snaking Through the Galaxy Could Help Shine a Light on Dark Matter

When the Milky Way consumes another galaxy, tendrils of stellar streams survive the merger, containing clues about the universe’s mysterious unseen matter

A composite color image of the Western Hemisphere captured by NOAA's GOES-16 satellite from 22,300 miles above the surface, January 15, 2017.

The Risks, Rewards and Possible Ramifications of Geoengineering Earth’s Climate

Injecting aerosols into the stratosphere could help cool the planet, but scientists have yet to study exactly how such solar geoengineering would work

The SpaceX Crew Dragon spacecraft docked to the International Space Station.

Future of Space Exploration

After a Successful Test Flight to the International Space Station, SpaceX Looks Ahead to Launching Astronauts

SpaceX’s new Crew Dragon spacecraft could launch the first astronauts from U.S. soil in almost a decade

The microbes in human guts, including bacteria, archaea, fungi and viruses, play a significant role in how our bodies respond to diseases and treatments.

How the Microbiome Could Be the Key to New Cancer Treatments

The effectiveness of drugs that help the immune system fight cancer cells appears to depend on bacteria in the gut

Fossilized bones from the distant past and the bones that constitute our skeletons today are perhaps the best tool to help scientists learn about the evolution of life.

How Bone Connects Life’s Past, Present and Future

A new book dives into the history of osteology, the study of bones, and everything we can learn from the skeletons life leaves behind

A mural titled "The Origin of Life on Earth" at NASA Ames Research Center. The mural depicts the formation of our planet and the conditions that led to the evolution of life.

Earth’s Rock Record Could Reveal the Motions of Other Planets

Studying the layers of Earth’s crust, scientists have created a “Geological Orrery” to measure planetary motions dating back hundreds of millions of years

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