Ariel NewsLocal news for Ariel, WA continually updated from thousands of sources on the web.Study challenges timeline of oxygen on Earth- September 29, 2007 "We seem to have captured a piece of time before the Great Oxidation Event during which the amount of oxygen was actually changing - caught in the act, as it were" WASHINGTON - Oxygen, key to life on Earth today, began to appear on the planet millions of years earlier than scientists had thought, new research indicates. via KOMO-TV Seattlehttp://www.topix.net/city/ariel-wa/2007/09/study-challenges-timeline-of-oxygen-on-earth?fr... |