#  The First Billion Years on Earth: When Did It Become Hospitable to Life? 

 



####  calendar\_today Date and Time 

 **November 15, 2006** 

 04:00PM - 04:00PM EST 

####  pin\_drop Location 

 **Harvard Center for the Environment Conference Room 24 Oxford Street**  



 

 



 

**John Valley (University of Wisconsin)**



 

 



 

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