Popular Science. Demystifying the worlds of science and technology since 1872.

There’s lots to dig into in this hugely popular messaging app.

In a handful of animals, tumors can be transmitted like infectious diseases or parasites, defying science’s tidy definitions.

The calf was transported over 800 miles to safety—without becoming a snack.

The latest designations are located in Alaska all the way to the U.S. Virgin Islands.

Pollen shows how present-day New Mexico completely transformed within only a few decades.

A fungal disease has wiped out up to 97 percent of northern long-eared bats in North America.

Brain activity and verbalization can both affect our pupils.

The 3D printed, airless design makes the wheels more adaptable.

And ‘Science Friday’ host Flora Lichtman on why she (mostly) still wants one.

Chert and Pumice have moves.

About 3 in 10 American adults now claim no religious affiliation.

‘Emotionally it’s a gut punch, heartbreakingly poignant.’