I think we can all agree that X-rays are cool, and crystals are, if not cool, at least interesting. X-ray crystallography is a scientific technique in which, you guessed it, X-rays are beamed through crystals, revealing the atomic and molecular structure of those crystals. It has resulted in 28 Nobel Prizes so far, and the technique is now even being used by the Curiosity rover on Mars.
In this video, Ri Channel celebrates X-ray crystallography:
Mentioned early in the video is Lawrence Bragg. Want to see him doing a bizarre demo with sand starting in the late 1950s? Check out this video, also from Ri Channel: