The world's hottest chili pepper is worse than bear spray

Guinness World Records crowns Pepper X as the new spicy pepper king.

A bit of Star Wars trivia: George Lucas named the fearsome Imperial spaceships “TIE Fighters” because he thought they looked like bow ties. Because that’s a bit silly, someone decided that TIE, in-universe, stands for “twin ion engine.” While that sounds completely made up, propulsion systems that require ions are a real thing. Contributor Briley Lewis explains how ion-based devices, known as Hall thrusters, will power NASA probe Psyche on its 2-billion-mile journey. What’s even more cinematic—as Psyche zips through the solar system, its thrusters will glow a hot blue. -Ben Guarino, Associate Science Editor

NASA's Psyche spacecraft will blaze an unusual blue trail across the solar system

Europeans ate a lot more seaweed 8,000 years ago

There are about 10,000 different species of seaweeds around the world today, but only 145 species are regularly consumed.

Unraveled nerves and mesmerizing caffeine crystals: 10 sensational glimpses of the microscopic realm

Photos from the Nikon Small World competition reveal a world that appears unreal.

How this programmer and poet thinks we should tackle racially biased AI

The research and poetry of Joy Buolamwini shines a light on a major problem in artificial intelligence.

The new electrified E-Ray is the quickest Corvette ever

The car's smart software knows exactly how to employ the Vette's new electric motor. Here's how it all works.

12-million-year-old ape skull bares its fangs in virtual reconstruction

Now extinct, Pierolapithecus catalaunicus could be one of the earliest known members of the great ape and human family.

How to start hiking barefoot, if you're into that kind of thing

Hear us out: no shoes in the forest.

Inside the lab that’s growing mushroom computers

The lead researcher says he is “planning to make a brain from mushrooms.”

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