During the Apollo program, rocket scientist Wernher von Braun practically had a monthly column in Popular Science. He regularly wrote articles explaining the scientific goal or unique engineering feat of each mission. Here, he details the discoveries made during Apollo 8's trip around the moon.
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.