A camera at an observatory in Hawaii captured a red sprite and a blue jet in the same frame.

Contrary to earlier research, a new international study finds that both liberals and conservatives respond to threats — just different ones.

Hundreds of people have died at a remote Himalayan lake, and some of them had no obvious reason to be there.

Two meteor enthusiasts have found a piece of an iron meteorite that fell over Sweden in November 2020.

Extremists and dogmatists struggle with certain kinds of cognitive processing, but they also tend to be impulsive and risk-loving.

Whale watchers in Bermer Bay, Australia witnessed two pods of killer whales trying and failing to kill a young male humpback.

Cosmologists simulated 4,000 versions of the universe in order to understand what its structure today tells us about its origins.

The ancestors of vampire squid started trawling deep, oxygen-poor waters around 30 million years ago, a long-lost fossil rediscovery reveals.

The chunk of space rock that killed the nonavian dinosaurs may have been a piece of a comet that Jupiter's gravity kicked onto a collision course with Earth.

Follow along as the Mars rover Perseverance lands on Mars on Feb. 18. Don't miss out on the final 7 minutes of terror.

Egyptian pharaoh Seqenenre Taa II seems to have been overwhelmed by multiple attackers on the battlefield, perhaps after being captured and bound.

Unusual weather blanketed the Acropolis with snow on Tuesday (Feb. 16), turning the iconic UNESCO World Heritage site in Athens into a scene from a holiday card.

A new artificially intelligent 'Ramanujan Machine' can generate hundreds of new mathematical conjectures, which might lead to new math proofs and theorems.

When the plasma of the Van Allen belts drops in density during a solar storm, it can set up the perfect conditions for electrons to travel nearly as fast as light.

The frills of protoceratops were probably the result of sexual selection.

At least twice, the Arctic Ocean was a freshwater pool cut off from other oceans and capped with almost 3,000 feet of ice.

A dinosaur track found by a 4-year-old on a Welsh beach belongs to one of the earliest dinos.

People's heartbeats may stop and restart as they die, with implications for the practice of organ donation.

An agate discovered in Brazil bears a remarkable resemblance to the Sesame Street muppet Cookie Monster.

Pornography was listed as the top source of information about sex for 18- to 24-year-olds, a troubling ranking given that pornography is not meant as sex education.

Though people believe they respect a logical, fact-based opponent, they actually have greater esteem for arguments based on experience.

Particles called axions may be the reason the 'Magnificent 7' cluster of neutron stars emits extreme X-rays.

A new coronavirus variant has been found in multiple California outbreaks, but scientists aren't yet sure whether it's more transmissible than other strains.

The new Netflix series 'Surviving Death' marches through an array of paranormal phenomena, some unprovable, some debunked and some genuinely mysterious.