Heart disease is the leading cause of death globally, according to the World Health Organization.

This 14-Year-Old Built an App That Detects Heart Diseases in Seconds

Siddarth Nandyala wants to put his tool in the hands of medical professionals so that they can catch cardiovascular abnormalities in their early stages

A group of female South Korean free divers on Jeju Island, known as the Haenyeo, exit the water after catching marine snails in November 2015.

South Korea’s Female Free Divers May Have Evolved to Thrive Underwater, Study Finds

The Haenyeo, a group of skilled divers on Jeju Island, plunge beneath the ocean’s surface without any breathing equipment, thanks to a combination of their training and genetics

Researchers have used genomic sequencing to trace what they’re calling the “longest migration out of Africa.”

New Research

Scientists Use DNA to Trace Early Humans’ Footsteps From Asia to South America

Over thousands of years, humans from Eurasia trekked more than 12,400 miles to eventually reach the southernmost tip of South America, a new genetic investigation suggests

During its first year of service, Freedom House Amublance Service transported more than 4,600 patients across 5,800 calls, saving 200 lives.

These Trailblazing Black Paramedics Are the Reason You Don’t Have to Ride a Hearse or a Police Van to the Hospital

In the late 1960s and early 1970s, Freedom House Ambulance Service set the standard for emergency medical care, laying the groundwork for the services available today

New research is revealing how climate change is impacting our eyes.

Climate Change Is Threatening Eye Health in Disturbing Ways

Cataracts, pinkeye and other ocular disorders are linked to heat, air pollution and higher UV exposure

A new study suggests chimpanzees don't just perform self-care—in some cases, they look out for each other.

Chimpanzees Perform First Aid on Each Other, Study Finds, and It May Shed Light on the Evolution of Human Health Care

Researchers describe cases of chimps tending to others’ wounds, as well as a chimp that freed another from a snare

Most babesiosis infections are caused by blacklegged ticks, also known as deer ticks.

A Potentially Life-Threatening Disease Caused by Ticks Is Expanding to New Parts of America

Babesiosis typically occurs in the Northeast and the Upper Midwest, but new research suggests rare cases are emerging in the mid-Atlantic region including Delaware, Maryland and Virginia

Philadelphia children eating a "three-cent dinner" at school, featured in the 1913 book School Feeding: Its History and Practice at Home and Abroad

American Schools Have Been Feeding Children for More Than 100 Years. Here’s How the School Lunch Has Changed

A new exhibition in Philadelphia explores how nutritional science, technological advances and political debates shaped the foods on schoolchildren’s trays

The king cobra (Ophiophagus hannah) is the world's longest venomous snake, and it's one of the species that can be neutralized with a new antivenom.

200 Snakebites Later, One Man’s Blood May Hold the Key to a Universal Antivenom

Over two decades, Tim Friede has injected himself with snake venom hundreds of times, and subjected himself to more than 200 bites. Now, scientists are working on an antivenom derived from his antibodies

Scientists analyzed more than 20 years of data on 164 wild mountain gorillas living in Volcanoes National Park in Rwanda.

For Mountain Gorillas, Being Social Comes With Both Benefits and Drawbacks, Study Suggests

A new analysis of wild gorillas in Rwanda indicates the effects of different social styles are dependent on context

Human wounds take longer to heal than the wounds of other mammals, researchers find. That could be because we have fewer hair follicles, and stem cells in hair follicles help regrow skin after an injury.

Human Evolution Traded Fur for Sweat Glands—and Now, Our Wounds Take Longer to Heal Than Those of Other Mammals

Even compared to chimpanzees, one of our closest relatives, humans’ scrapes and cuts tend to stick around for more than twice as long, new research suggests

For 25 of the 26 years the American Lung Association has reported State of the Air, Los Angeles—pictured here in smog—has been declared the city with the worst ozone pollution in the United States.

Nearly Half of Americans Still Live With High Levels of Air Pollution, Posing Serious Health Risks, Report Finds

The most recent State of the Air report by the American Lung Association found that more than 150 million Americans breathe air with unhealthy levels of ozone or particle pollution

A cell culture plate with pluripotent stem cells, which can differentiate into any kind of cell in the body.

Stem Cell Therapies Could Treat Parkinson’s Disease by Rebuilding Lost Circuitry in the Brain, Studies Suggest

Two small clinical trials tested the safety of injecting stem cells into the brains of Parkinson’s patients and found no adverse effects

Ronin the African giant pouched rat is one of more than 100 rats trained by a Belgian nonprofit to sniff out deadly land mines.

Super-Sniffing Rat Sets a New World Record for Discovering Deadly Land Mines—and He’s Just Getting Started

Ronin, a 5-year-old African giant pouched rat, has found 109 land mines and 15 other unexploded ordnances in Cambodia

Many teens have shared videos on social media showing their use of nitrous oxide, or laughing gas, which is sold in small metal canisters.

The Long, Strange History of Nitrous Oxide, a Popular Drug Users Have Been Inhaling for Hundreds of Years

Galaxy Gas has brought the drug back into the spotlight, and scientists are raising alarms about its health risks

A new, temporary pacemaker is smaller than a grain of rice.

Researchers Develop the World’s Smallest Pacemaker, and It Could Be Revolutionary for Newborn Babies With Heart Defects

The new device is smaller than a grain of rice and gets absorbed by the patient’s body when it’s no longer needed, eliminating the risks of an extraction surgery

Illustration of a human cancer cell

How Do Cancer Cells Migrate to New Tissues and Take Hold?

Scientists are looking for answers about how these confounding trips, known as metastases, occur throughout the human body

Posters, newspaper advertisements and radio shows promoted carrots' health benefits.

Carrots Can’t Help You See in the Dark. Here’s How a World War II Propaganda Campaign Popularized the Myth

The British government claimed that eating carrots helped its fighter pilots shoot down German planes at night. In truth, the Royal Air Force relied on top-secret radar

Chloe Yehwon Lee was a finalist in the 2025 Regeneron Science Talent Search, the most distinguished STEM competition for high school seniors in the United States.

This 17-Year-Old Scientist Is Making an Acetaminophen Alternative That Is Less Damaging to the Liver

Chloe Yehwon Lee’s research could change the painkiller, known by the brand name Tylenol, for the better, ultimately reducing emergency room visits and cases of liver failure

More than a third of endometriosis patients are misdiagnosed with mental health conditions.

For Some Women With Serious Physical Ailments, Mental Illness Has Become a Scapegoat Diagnosis

Patients with difficult-to-diagnose conditions like endometriosis are often sent home with diagnoses like anxiety or bipolar disorder

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