Harvard scientists triumphantly announced that they'd created metallic hydrogen last month, but now it's suddenly gone. Scientists hailed it as the “holy grail” of high pressure physics when they finally produced it in the lab: metallic hydrogen, a century after it was first theorized to exist. And now that sample, which had been held in a hyper refrigerated laboratory, has vanished into thin air, and scientists can’t figure out why. Reports indicate that the metallic hydrogen had been kept between a vice of two diamonds at huge pressures while being stored at 80 Kelvin, but something happened in the lab...