Read the latest articles from Popular Science (Page 846)

New guidelines for Americans emphasize physical activity at any level.

Public health researchers across the country have found growing evidence of a relationship between air pollution and fertility.

Some serious space weather at play.

Ever wonder why many Instagram photos look the same? The answer is presets.

Only one kind of mask can truly protect you from the smoke.

Despite accusations, the state has excellent manage policies—it's just also built to burn.

Specializing in one sport won’t turn your child into an elite athlete—and it might get them hurt.

Consider choosing what DNS service you use. Don’t worry, it’s easier than it sounds.

And other important questions.

Suppressing sparks isn’t easy in wildfire-prone Los Angeles.

Manage your time, stay calm, avoid distractions, and more.

Rising temperatures are creating new habitats for ticks.

We’re closing in on one of the most important numbers in the universe.

Track Mode shows the potential of electric cars to go fast.

There are life-saving measures any bystander can take.

A new book catalogues the map-maker's lesser-known works.

One of the largest studies yet on the relationship between cell phones and cancer hasn't shifted the scientific viewpoint.

An old theory gets a new assist from the sun.

Facebook now gives you a grace period on your bad messages—and other apps do too.

Hibernation, unfortunately, is not a healthy option for humans.