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Genetics

Seven mummified cheetahs and the remains of dozens more were found in caves in northern Saudi Arabia.

Cool Finds

Mummified Cheetahs Discovered in Caves Could Help Saudi Arabia Bring the Wild Cat Back to Its Historical Range

Researchers thought that just one subspecies of cheetah lived in Saudi Arabia long ago. But an unexpected discovery seems to broaden the gene pool

Through gene-editing, researchers in the field of synthetic biology hope to make endangered species more resilient against disease or climate change and protect human health, among other goals.

Three Stunning Ways Biologists Aim to Edit Animal and Plant Genes to Fight Diseases and Extinction

The strategy, known as synthetic biology, is gaining momentum globally as a conservation tool and human health solution, despite attracting some critics

The "Tumat puppies" were discovered with their fur, skin and stomach contents still intact.

Contents of a Wolf Pup’s Stomach From 14,400 Years Ago Are Teaching Researchers About the Lives of the Last Woolly Rhinos

Analysis of woolly rhinoceros DNA recovered from the permafrost-preserved wolf further hints that the Ice Age beasts went extinct because of a sudden shift in the climate

Scientists found the DNA on a drawing similar to the Portrait of a Man in Red Chalk​​​​​​, which is shown.

Could Leonardo da Vinci’s DNA Be Hiding Inside One of His Renaissance Sketches?

Scientists have discovered male human DNA on a chalk drawing that may have been created by the famous artist and scientist. But they cannot definitively link the genetic material, or the sketch, to Leonardo

About 50 Apennine brown bears live in central Italy.

After Living Alongside Humans for Millennia, These Italian Brown Bears Have Evolved to Become Less Aggressive

Researchers found genetic differences that likely resulted from humans killing aggressive bears, leaving docile individuals to breed and pass along their genes to offspring

In 2025, researchers watched an interstellar comet, learned about human origins and traced the spread of measles.

The Ten Most Significant Science Stories of 2025, From Medical Breakthroughs to an Interstellar Visitor

All year long, these moments captivated the public, demonstrated dangerous trends, and pushed research and innovation forward

A new study hints that Australia's first people arrived via a major northern route and a smaller southern route. 

Modern Humans Reached Australia Around 60,000 Years Ago via Two Routes, Genetic Analysis Suggests

The study bolsters one hypothesis of when people arrived at the landmass that became Australia and other islands, and presents some of the earliest evidence of seafaring

Genetic analyses revealed some of the winding paths behind the spread of domestic cats.

When Did Domestic Cats Take Over the World? New Research Suggests They Arrived in Europe and China Centuries Later Than We Thought

Two genetic analyses suggest that our feline friends reached China around 1,400 years ago via the Silk Road, and that they traveled from North Africa to Europe around 2,000 years ago

The birch bark tar is covered in tooth marks and contains traces of saliva.

New Research

Ancient DNA Reveals That a Teenage Girl Chewed on This Wad of ‘Gum’ 10,500 Years Ago

Based on genetic material preserved in birch bark tar from Estonia, researchers found that the teen likely had brown hair and brown eyes

Both the Czechoslovakian wolfdog and the chihuahua have some recent wolf DNA, a new study suggests.

A DNA Analysis of Almost 3,000 Canines Suggests That Most Dogs Have a Little Wolf in Them

The two subspecies split about 20,000 years ago. But since then, they may have interbred more often than Smithsonian scientists thought

Oliver and his father, Ricky

This Toddler Was the First Person to Receive a Test Treatment for a Rare Genetic Disorder. Nine Months Later, His Progress Is Inspiring Hope

Oliver Chu is one of five kids participating in a clinical trial investigating a gene therapy for Hunter syndrome, a disorder with symptoms akin to childhood dementia that limits life expectancy

T. oblongifolia thrives in Death Valley's high temperatures.

This Shrub Thrives in Death Valley’s Scorching Temperatures. Where Do Its Heat-Tolerant Superpowers Come From?

Tidestromia oblongifolia thrives in high heat—and scientists think it may hold the key to making food crops more resilient amid global warming

One of the woolly mammoth's legs

Scientists Extract the Oldest RNA Ever Found, Revealing How a Woolly Mammoth’s Genes May Have Functioned 40,000 Years Ago

The frozen remains of a juvenile woolly mammoth named Yuka preserved details about the animal’s last moments alive

A bee buzzes by a hybrid magenta-and-yellow snapdragon.

Colorful Snapdragons in the Valleys of the Pyrenees Offer a Rare Window Into How Evolution Happens

Studying the ways that magenta and yellow flowers intermingle paints a vibrant picture of how the plants exchange genetic information—and what keeps each color variety unique

A spiny-tailed iguana on Clarion Island

Iguanas Are Native, Not Invasive, on This Mexican Island, DNA Study Suggests, Rewriting Conservation Ideas

The spiny-tailed iguanas of Clarion Island predate human presence in the Americas by tens of thousands of years, researchers say

Bowhead whales' cold-water habitats help the animals make more CIRBP protein.  

Bowhead Whales Live Long Lives. Do They Hold the Key to Human Longevity?

A cold-activated gene that helps the mammals repair their DNA may also help humans live longer

New research suggests a genetic dynamic that may have contributed to Neanderthals' extinction.

A Single Gene Could Have Contributed to Neanderthals’ Extinction, Study Suggests

New research posits that a genetic incompatibility between female offspring of humans and Neanderthals and their children could have led to pregnancy complications and the eventual end of the species

Tim Andrews and his wife leave the hospital after he received the pig kidney transplant about nine months ago.

Pig Kidney Transplant Removed From Patient After a Record-Breaking 271 Days

Tim Andrews was the fourth patient in the United States to receive a pig kidney transplant. He will now return to dialysis and wait for a kidney from a human donor

Postpartum depression affects some one in eight women in the United States. It typically occurs in the first weeks after childbirth, after a sudden drop in levels of estrogen and progesterone.

A Blood Test Can Now Predict a Mother’s Risk of Postpartum Depression

Scientists are learning more about this leading complication of childbirth, and treatments are improving

Two new studies are shedding more light on the behavior and lifespans of naked mole rats.

Scientists Explore the Mysterious Lives and Longevity Superpowers of Naked Mole Rats

The nearly hairless rodents are extremely resistant to cancer—and can live to be 37 years old

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