Every day we're exposed to thousands of man-made chemicals, some of which seep into our bodies and remain there for decades. What that means for our health, we don't fully understand--but I subjected myself to a battery of new tests in search of answers
Earth's yellow sun is the source of its power.
Short answer: They're trying!
E. coli bacteria are all over our skin -- why not modify them to help us out?
To block the rays damaging clothes or outdoor furniture
High-tech health care isn't just for hospitals. For some of the most innovative advances soon to come, check your bathroom
Tiny nanoparticles are a huge part of our lives, for better or for worse.
The tiniest tech is growing fast, and largely unregulated
Experts go head to head on the issue of nanotech safety
This mobile-phone system helps you choose a sunscreen and tells you when to reapply
New research uncovers unusual benefits of vitamin D
No more pencils, no more books: With PopSci's guide to the best continuing-ed programs on the Web, you can lose the paper and still gain a grade-A education
Why does the planet act like a giant magnet? One scientist is building his own Earth to find out
The endowment effect on your eating habits
We visit operating rooms, observatories, and islands full of slightly-less-than-rational monkeys to find the young geniuses who are shaping the future of science
Sometimes our biggest fear is not knowing what to fear most. Fortunately, the weird science of risk analysis can teach us to judge better and fear smarter
Some answers from an atmospheric scientist
Examining 8 promising methods of male contraception in development. Happy Father's Day!
A microbiologist explores the distinctive odors of a day at the beach.
It's damage-resistant, cheap, and so much fun to watch
Also useful for telescopes and microscopes
How to stay alive so you can do science in scorching heat