Read the latest articles from Popular Science (Page 722)

A new study helps explain why bear sightings are so common on hiking trails.

The B-52 is big, old, and rugged. Here's what they look like up close.

Redefining the second is a big project. This is one crucial step towards accomplishing that goal.

New research shows the compounds created during a blaze stick around, and could be hazardous to humans.

Zero-gravity affects organ fitness—what does that mean for future space missions?

Ditch your old device but keep your data.

Millions of people lack access to clean water across the world, but this accessible technology could help.

When a species is a rare as the Disa forficaria, pollination requires some creativity.

The latest addition to the Boston Dynamics family has a vacuum-powered grabber and tons of sensors.

Certain vegetarian and vegan foods come with their own health risks.

Digital art and collectibles are blowing up on the blockchain.

The last recorded sighting of a wild elk in the Mountain State was in 1875.

Rise and really, really shine.

Researchers still don't fully understand why animals, including humans, need sleep.

Discord started as a way for gamers to communicate, but it has since branched out.

Here's everything you need to know this week.

Solar canals save water, create energy, and protect natural lands all at the same time.

Quadruple the resolution of your photos without crushing the quality.

Less methane-filled flatulence could make for a more sustainable way to raise livestock.

But going to a clinic for a PCR test is still a better option in some cases.