Platinum is a ferociously expensive metal that is difficult to obtain and purify. Most of the small supply we produce every year isn’t put to use for its properties as a metal. Instead, it’s used as a ...

I was fascinated by the idea of jet packs when I was a kid. They were sci-fi magic, and the idea that you could strap into an oversized backpack wrapped in tinfoil and fly around was very enticing.