Supernova left its mark in ancient bacteria : Nature News & Comment April 16, 2013Posted by sandyclaus in Drake Revisited.
Sediment in a deep-sea core may hold radioactive iron spewed by a distant supernova 2.2 million years ago and preserved in the fossilized remains of iron-loving bacteria. If confirmed, the iron traces would be the first biological signature of a specific exploding star.
Shawn Bishop, a physicist at the Technical University of Munich in Germany, reported preliminary findings on 14 April at a meeting of the American Physical Society in Denver, Colorado.
Wait, don’t ALL heavier elements coem from starstuff?