Submission + - What are grand technology and scientific challenges for the 21st century? (networkworld.com) 1
coondoggie writes: "What are the next Big Things in science and technology? Teleportation? Unlimited clean Energy? The scientists and researchers at DARPA and the White House Office of Science and Technology Policy put out a public call this week for ideas that could form what they call the Grand Challenges — ambitious yet achievable goals that that would herald serious breakthroughs in science and technology."
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A crossbow.