Scientists in Albuquerque have a new theory for origin on Earth 's iron . Previously it was unclear how iron was scattered throughout the mantle . But research suggests the vapourisation point of iron is lower than thought . This means it would have turned into vapour when rocks hit early Earth . It would have drifted up in plumes and then rained down on the surface .
Scientists in New Mexico have a new theory for origin on Earth 's iron . Previously it was unclear how iron was scattered throughout the mantle . But research suggests the vapourisation point of iron is lower than thought . This means it would have turned into vapour when rocks hit early Earth . It would have drifted up in plumes and then rained down on the surface .