How you contribute to global warming depends a lot on where you live.
See how PopSci staffers are staying green this Earth Day, and get the science behind the scenes
In the global race to reduce carbon emissions, these eco-minded communities, from Kansas to the Maldives, lead the pack. Here's how they're making their carbon footprints disappear
See the effects of global warming while contributing to them!
Metaphors for understanding the mind
The industry and the F.A.A. say the climate effects of flying civilians into space will be negligible, but some scientists fret about the accumulation of black carbon in the stratosphere.
PopSci tackles life's whys, hows and who-dunnits in this Q&A-style; feature
Gray Matter's own Theodore Gray reports from his day job at Wolfram on how his new "knowledge engine" provides exactly what Google can't
We talked with judges from two of the world's most prestigious science fairs to get some tips on how to put together a great project and have an even better time.
It's based on the suffering of 4,637 Norwegian men and women aged 20 to 90.
How much destruction would a nuclear bomb cause if dropped on or near your hometown? Two online calculators do the math
Engineering the Earth's resources with remote-controlled clouds, artificially induced snow, and trained monkeys -- for sports' sake
Time will tell if natural gas is a bridge or a brick wall.
Some musings on our favorite mycological marvels.
We spoke to candidates with science backgrounds from across the political spectrum
A buyer's guide to harnessing the energy of the sun
Conceptual shelters that will protect us all from the perils of our rapidly changing environment: rising waters, extreme heat, rampant pollution and overpopulation