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Nov. 3, 2011 Volume 33, No. 11

The birth of oxygen

Saturday Morning Science this weekend will focus on the birth of oxygen and what it means for every mammal. What was the cause of the biggest mass extinction in Earth’s history? It wasn’t a comet or a meteor; it was a drastic change in Earth’s atmosphere caused by microbial life.

“The Birth of Oxygen” will be from 10:30 to 11:30 a.m. Saturday, Nov. 5, in the Monsanto Auditorium of the Bond Life Sciences Center. Coffee and bagels will be served at 10 a.m.; the event is free.