Diamonds aren't forever... In the Z-Machine.
Z machine melts diamond to puddle
Didn't see this listed in Space or Off Topic yet, so hopefully I'm not reproducing a prior post. Didn't see any tho', so hopefully all's clear.
Not exactly space-related, but certainly interesting science for future nuclear reactor prototypes and such. Though in this case I guess they were testing the tolerances of diamonds for use as a capsule material for future nuclear reactors? I'm assuming the pellet-bed type reactors that are being dreamed up for future uber-safe reactors and whatnot...
Kind of cool. :)