A team of University of Maryland engineering students built a human-powered helicopter that flew for 50 seconds, getting close to the 60 seconds required to win the $250,000 Igor Sikorsky Prize.
US recyclers are nervous about losing their largest market after China began enforcing new environmental laws this year.
Doing Good
What happens when ordinary people decide to pay it forward? Extraordinary change...
David Eads sits among old computer parts waiting to be recycled or refurbished by FreeGeek Chicago volunteers.
David Eads runs FreeGeek Chicago, 'an Apple Store for the rest of us'
FreeGeek Chicago gives volunteers hands-on training in restoring old computers to sell or recycle – while they earn credits toward taking home their own desktop or laptop free of charge.
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