Meteors' mysterious origin traced to 1490 event 15:50 07 January 2008 NewScientist.com news service Stephen Battersby Last week's Quadrantid meteor shower was probably debris from a deep-space explosion that went off in the late 15th century, new observations reveal. The meteors, which return every January, were observed more closely than ever before when a group of 14 astronomers tracked them for nine hours on a flight from California, US, to the North Pole. They found that the shower peaked at around 0200 GMT on Friday, matching a prediction made by Peter Jenniskens of NASA. He based his prediction on the...