New claim staked for metallic hydrogen

Some experts doubt report of creating elusive material

hydrogen under pressure

TIGHT SQUEEZE  As scientists pressed hydrogen between two diamonds, it changed from transparent (left) to black (middle) and, finally, to a reflective state (right). That reflectivity indicates that the hydrogen transformed into a metal, researchers claim.

Ranga Dias, I.F. Silvera

A team of scientists may have given hydrogen a squeeze strong enough to turn it into a metal.