The Hardest Part of Making a Nuclear Bomb

Nuclear bombs are easy to make, right? Find some uranium, shove in some explosives and—BOOM!—you're quite literally done. Umm, sorry, nope. The big problem in making a nuclear bomb is that you need enriched uranium, and that's actually a real pain in the ass to make. In this video the engineering guy Bill Hammack » 6/19/12 7:55am 6/19/12 7:55am

How the Most Accurate Clocks in the World Work

Atomic clocks are super accurate, but do you know how they work? Probably not! Well, unless you know about quartz vibrations regulated by Cesium energy states at the atomic level, which are separated by magnets and ovens. But assuming you don't know that stuff, here's the engineerguy Bill Hammack explaining how these… » 6/12/12 3:20pm 6/12/12 3:20pm