LifePlanetary smashup leaves trail of frozen lava Volcanic glass and vaporised rock found around a young star are thought to be the detritus of a collision between two rocky bodies at least as big as the moon ¿ìè¶ÌÊÓÆµ
EarthComets, not asteroids, to blame for moon's scarred face Greenland rocks suggest dirty snowballs pummelled the young moon and Earth, soaking our planet with life-nurturing oceans ¿ìè¶ÌÊÓÆµ