Subtle movements create current
How water could be harnessed for roughly a third of U.S. annual electricity usage
Steven Chu, the new U.S. secretary of energy, is a Nobel-winning physicist and an unabashed advocate of fighting climate change. But can he negotiate the political realities of transforming the energy economy?
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
Africa's rapid growth is not affecting the continent equally. Here's a look at five African countries that represent some of the brightest spots.
The first European explorers thought they were American Indian burial mounds, but found only dirt and pebbles inside when they sliced one of the mounds in half.
Batteries not required.
Microsoft unveils Sun Microsystems' vision for 2004
FDA wants to make this official and recently asked to know more
Astronomy: Timothy Ferris eyes the amateur asteroid-watchers.
In a wide-ranging interview with PopularScience.com, Aldrin talks about a mission to Mars, 34 years of sobriety and the future of American leadership in space.
A state-by-state breakdown of policies that could change your community.
To reach the bottom of all five oceans, this Texas businessman commissioned “the most significant vehicle since Apollo 11.”
Science of the Union.
It might not (just) be foul play.
In a highlight of last week's conference, Gates calls for zero emissions and agrees with Obama: We need nukes
Both the Atlantic and Pacific areas saw a record number and intensity of storms.
A commute so quick you could just die.
We're not built for this stuff.
How to build a subway in the Eternal City.
I study the motion of the ocean through rocks.