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The Defiant, showcased in a new video from Sikorsky, is pitted against one from Bell in the Army's Future Long-Range Assault Aircraft competition.

Tonga faces possible new COVID risks as it assesses damage from an eruption and tsunami waves.

Horny Vikings are revisionist history.

What you feel matters.

Breathe new life into those dusty old machines.

Criminals can use the codes to try to steal money and personal information. Here's how to stay safe.

Three PopSci editors share the freakiest facts they could find.

The atom-sized version of extreme weather.

It just needs a little shaping… to the salon! 

Cells may back out of self-destruction, posing one way they can manage their own functions.

Major automakers already have electric vehicles on the market. So what does Chrysler have in store?

Catastrophic waves are unlikely, but residents should be cautious.

Plain old water doesn't get enough credit.

The agency doesn't tell people to stop using cloth coverings, but its updated guidelines do put more oomph behind well-fitted N95 and KN95 masks.

We won't wade into debate over whether or not it's OK to wear shoes in the house.

When it's winter in Idaho, it's summer in Curaçao. Why?

Here’s how the federal agency is responding to an “increasing frequency” of breaches.

Asking for a friend...

The past decade is also the hottest the modern world has ever seen.

It's called the DDG(X), and it could be a successor to the Arleigh Burke-class destroyers of today.