New analysis of a mass grave in medieval England reveals a bleak glimpse of a community overwhelmed by the Black Death.

Heartbeat-scanning lasers created by the U.S. military can ID your cardiac 'fingerprints' from hundreds of feet away.

Some types of parasitic infections can lead to serious heart problems.

Over decades, a brazen thief stole hundreds of eggs from rare and endangered falcons' nests around the world, to sell to private collectors.

Wild falcons are highly prized by private collectors, who pay tens of thousands of dollars for the rare birds.

In low Earth orbit's growing "space junkyard," new technologies could reduce the risk of collisions.

Harley Quinn has a hyena friend in the movie "Birds of Prey," but even without supervillain sidekicks, hyenas are super-awesome.

A group of sharks writhing in shallow water may have looked like they were beached, but they weren't injured or in distress.

A newfound species of thalattosaur, a Triassic marine reptile, had a dramatically pointy skull unlike any seen in reptiles alive today.

Arctic permafrost is thawing, and some zones are melting so quickly that the new landscape becomes a soggy marsh riddled with sinkholes.

The U.K.'s Ministry of Defense announced that it will soon release formerly classified government files about UFO encounters.

Skeletal remains of 42 people were recently unearthed at a farm in December 2019, but the construction company that found the bodies has yet to release a report.

Dymka the cat suffered severe frostbite in all four paws, but after they were amputated she received new titanium limbs.

In a historic Polish synagogue dating to the 18th century, restorers found a secret stash of Jewish ritual objects, concealed under the floor.

Some extinct dinosaurs were smaller than a modern chicken.

A Civil War artifact found in Virginia could represent a type of talisman that was popular for protection against evil: a so-called witch bottle.

Fallout from nuclear bomb tests could help experts detect fraudulent whiskeys that are purportedly more than a century old.

A hypothetical timepiece called the Doomsday Clock measures our nearness to Armageddon — by nuclear weapons, climate change and other global threats.

Low temperatures in Florida prompted an unusual warning from the National Weather Service.

Hundreds of people in ancient Herculaneum died when Mount Vesuvius erupted. And their deaths weren't instantaneous, new evidence reveals.

A search for the truth behind UFO sightings leads to the discovery of government cover-ups.

A new PBS documentary probes the deliberation behind the historic decision.

Modern birds can trace their origins to theropods, a branch of mostly meat-eaters on the dinosaur family tree.

High-resolution video of tiny, bizarre silk structures found across the Amazon known as a silkhenge show the mysterious spider construction as never before.