The powerful, unstable explosive found in children's toys

The cap guns that kids use and poppers that they throw at the ground aren't just annoying. They contain one of the most unstable diy compounds that anyone could lose a hand to. The worrying concoction, called Armstrong's mixture, is one of the easiest, and most flammable, explosives that anyone would care to make. » 4/09/13 7:20am 4/09/13 7:20am

At last, real-life physics can justify all those fake movie explosions

Ever noticed that, in movies, the slightest tap of a bullet on a car or a helicopter will cause it to burst into flames, without the presence of an accelerant or any source of fuel? Finally there's a physical effect that can explain why a metal bullet slamming into a metal car can cause it to turn into a fireball.… » 3/01/13 6:30pm 3/01/13 6:30pm