By William Speed Weed
Posted 11.11.2004 at 4:00 pm 0 Comments
Take a 20-pound bag of mulch, dump it on a table, and sort its contents by size, down to the half millimeter. This is the mind-numbing task of the root sorter. “We know lots about the ecosystem above the ground,” says Ruth Yanai, a professor
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.
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