Geoengineering is always controversial, but it's even more controversial when you don't tell anyone first.
The Microsoft chairman, it turns out, has a small history of dabbling in climate-altering schemes
All DARPA's Paul Cohen needs to do is get past the problem of people
Geoengineering could cause more problems than the global warming it aims to stop
Engineering the Earth's resources with remote-controlled clouds, artificially induced snow, and trained monkeys -- for sports' sake
The salmon population in an area dosed with iron has doubled.
The eruption of Eyjafjallajökull gave scientists a chance to test a high-stakes geoengineering idea.
David Keith believes strong-arm strategies could soon be our last resort for reversing record levels of carbon in the atmosphere
Microsoft's chairman is part of a joint patent filing for using fleets of vessels to stop hurricanes via geoengineering
The Army Corps of Engineers is nearly out of options for keeping a section of the upper Mississippi River flowing.
Shock Trauma photo gallery, by Popular Science staff photographer John B. Carnett
Seeding the seas or the skies to dial down the planet's temperature
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