Elana Spivack

The quasi-periodic eruptions of X-rays from a black hole 300 million light-years away are unlike any researchers have ever seen before.

Scientists thought they saw a distant star swallow a planet for the first time ever. But new observations from the James Webb Space Telescope suggest something very different, but equally rare, may have happened instead.

Performed remotely in Mexico by engineers and embryologists in New York, an automated fertility treatment resulted in conception and, more recently, a live birth.

The oldest lake in the world dates back about 25 million years and is also the world's deepest and most biologically diverse lake.

Nuclear bunkers aren't a foolproof way to stay safe during a nuclear attack. Here's why.

Humans don't have hollow bones like birds do, so how big would our wings have to be to lift us off the ground?

Are UFO sightings a 20th-century phenomena, or did people report seeing them earlier in history?

An astronomer describes how the moon's surface temperature changes.

Scientists explain why animals in Australia wield venom as a weapon.

Gastroenterologists describe the factors that go into passing gas and which foods make farts smell.

How much of the brain does each person use throughout their day?

Do the clusters of water and ice particles that make up clouds really float in the sky?

A pod of about 30 orcas attacked and "badly wounded" two adult gray whales off the coast of California, according to drone footage.

Contrary to a finding from the 1960s, a new study reveals that the bulk of Earth's biomass comes from giant and tiny organisms.