Terahertz radiation, or T-rays, can see through clothing, paper, cardboard and numerous other materials, so scientists have been touting their potential for years. A T-ray-based imager could spot concealed weapons hidden under a person's clothes or even identify tumors without inducing any bad side effects.
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Science is reinventing play, from extreme sports to gamification to ridiculous roller coasters to the playgrounds of tomorrow, and this issue is chock full of fun. Also, on a less fun note: Did global warming destroy my hometown?