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Meteorites did not enrich ocean life: study

An explosion of ocean life some 471 million years ago was not sparked by a meteorite bombardment of Earth, said a study Tuesday that challenges a leading theory. Without offering an alternative explanation for what is known as the Great Ordovician Biodiversification Event (GOBE), researchers from Sweden and Denmark said the creature expansion started some two million years before the space rock bombardment. This was based on fresh dating of crystals from meteorite-bearing sediments in Sweden. "This study shows that…