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People with two copies of the gene variant APOE4 are almost certain to get Alzheimer’s, say researchers, who proposed a framework under which such patients could be diagnosed years before symptoms.

All vaccines have at least occasional side effects. But people who say they were injured by Covid vaccines believe their cases have been ignored.

For the first time, scientists observed a primate in the wild treating a wound with a plant that has medicinal properties.

She was believed to be the first Western scientist to study the animals in their natural habitat, but she struggled to overcome sexism in academia.

When Ruby Reynolds and her father found a fossil on an English beach, they didn’t know it belonged to an 82-foot ichthyosaur that swam during the days of the dinosaurs.

A number of case studies published after recent total solar eclipses highlight the importance of safe viewing.

Many patients are reluctant to undergo colonoscopies or conduct at-home fecal tests. Doctors see potential in another screening method.

DNA has shown that the extinct humans thrived around the world, from chilly Siberia to high-altitude Tibet — perhaps even in the Pacific islands.

For 40 years, Dr. Jane Burns has been working to find the cause of Kawasaki disease, an illness that can lead to aneurysms and heart attacks. Her work has brought together a most unlikely team.

About 8,200 years ago, in one of the last places settled by humans, prehistoric peoples began painting comblike designs as the climate shifted.

Dr. Woodson’s house, the birthplace of the annual month, was a hub of scholarship, bringing together generations of intellectuals, writers and activists.

The genetic treatment targeted a particular kind of congenital deafness and will soon be tried in children who are younger.

Coronary artery bypass grafting, the most common cardiac procedure in the United States, was studied mostly in men. Women are paying the price.

The island is shedding 20 percent more than previously estimated, a study found, potentially threatening ocean currents that help to regulate global temperatures.

An Oxford researcher measured the effect of popular workplace mental health interventions, and discovered little to none.