Just 15 minutes a day! Absolutely free! Guaranteed results! The same breathless promises have been prying open our wallets for decades, offering hope for beauty, health, popularity and eternal youth. We combed the archives for the most brazen scams from the 1920s to the 1940s. Some seem harmless, while others are downright sinister (such as Alois P. Swoboda, who even managed to swindle Woodrow Wilson, with his supposed secret to "supreme life.")
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.