In 1921, PopSci rallied for the exciting new technologies to be brought stateside. Europe not only pioneered fingerprinting and ballistics, but had "no fewer than four chairs in as many... universities occupied by men who are professors of crime detection." The first American criminalistics lab wouldn't be established until after the infamous St. Valentine's Day massacre in 1929.
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.