Space-based Solar Power beamed down to earth sounds pretty far out, but the technology is further along than many suppose, the sun never sets in space, and space is a Saudi Arabia of unlimited energy for the nation with the technology to harness it. PG&E (California) in conjunction with SolarEn has announced a 200MW space solar project to be up by 2016.
posted by stbalbach on Apr 20, 2009 - 87 comments

Is solar-powered flight getting any nearer? As noted previously on Metafilter, solar powered aviation has travelled a long way since the heady days of the Gossamer Penguin. But could it actually one day power commerical flight? [more inside]
posted by MrMerlot on May 11, 2008 - 25 comments

"...this effort has examined devices that can be built into a shoe, (where excess energy is readily harvested) and used for generating electrical power "parasitically" while walking."

Regenerative braking in a shoe for powering small personal electronics, courtesy of MIT's Media Lab. With video. [via Hack A Day]
posted by scarabic on Apr 12, 2005 - 13 comments

It's not the other white meat, but it seems cows have yet another use.

"That's some good shit, man (in my very best Tommy Chong!)."
posted by LouReedsSon on Jan 24, 2005 - 14 comments