Soulskill from the does-it-burn-as-well-as-dead-dinosaurs dept.
slew writes "This article talks about a study accepted to Physical Review Letters which theorizes that iron oxide goes through an insulator/metal phase change with high temperature and pressure. Originally it was thought to be a crystalline structure change, but now apparently it is theorized to be a new type of metallic state. This discovery might offer new insight on how the earth's magnetic field operates."
The perversity of nature is nowhere better demonstrated by the fact that, when
exposed to the same atmosphere, bread becomes hard while crackers become soft.