NOVA's What's This Stuff? Contest
Be the first to identify 10 mystery materials from a set of clues and win a prize.
http://www.pbs.org/wgbh/nova/tech/what-stuff-contest.htm
NOVA's What's This Stuff? Contest
Be the first to identify 10 mystery materials from a set of clues and win a prize.
http://www.pbs.org/wgbh/nova/tech/what-stuff-contest.htm