Read the latest articles from Popular Science (Page 1225)

Look to the iris.

Following a moratorium on "dangerous" flu research, new studies reshuffle the molecular mechanisms that allow bird flu to infect humans.

A new study finds potentially harmful levels of heavy metals in commonly used lipsticks and glosses.

New criteria for choosing NSF grants is the latest salvo from our anti-science government.

Beginning in May, a plane will fly across the United States on sunlight alone. In 2015, it will circumnavigate the world.

The caveman diet, barefoot running, co-sleeping: We spend an awful lot of time trying to live like our ancestors. Here's why that logic is wrong.

The images undermine the Nigerian Army's claim that it destroyed only 30 homes; in fact, it burned 2,300.

And calm your drone-panicked nerves!

IBM cuts everyone's commute times by analyzing a massive trove of phone records.

"A Boy and His Atom" is the must-see film of the year.

Canadian biochemistry professor proposes a deep investigation.

Emerging research on hoarding classifies it as its own distinctive disorder, separate from OCD.

The International Bitterness Unit explained

Most of us live 27 degrees north of the equator, give or take.

A decade in the making, this new encryption system is so far unhackable.

Today’s supersonic test flight marks a big milestone for the company -- and suborbital space tourism

Patients who learned weight maintenance techniques through the game "Second Life" were more likely to keep the weight off.

How to get rid of a pest that has spread to 23 states

Take a look into a supersonic wind tunnel at NASA

Great balls of power!