Earth’s First-Ever Hydrogen Metal

With pressure greater than the force within Earth’s core, two diamonds pressed upon liquid hydrogen and something happened for the first time ever on our planet: the lightest element in the periodic table turned into a small bit of metal. After years of research and experiments, this alchemical creation occurred under the direction of two Harvard physicists—whose paper was published in the journal Science. The experiments are still being considered—and debated—by other physicists, but if metal hydrogen proves to be stable, it could revolutionize everything from computer speed to space travel.