Freaky Friday: Climate science and geology -- a tale of three histories
By Paul F. Hoffman (Department of Earth and Planetary Sciences, Harvard University). Dr. Hoffman's interest in 'Snowball Earth' related studies originated in northern Namibia, where he has worked annually since 1993. The Snowball Earth hypothesis says that the Earth's surface became entirely or nearly entirely frozen at least once, some time earlier than 650 million years ago. The hypothesis remains controversial and is being debated under the auspices of the International Geoscience Programme (IGCP) Project 512: Neoproterozoic Ice Ages. There are a number of unanswered questions, including whether the Earth was a full snowball, or a "slushball" with a thin equatorial band of open (or seasonally open) water.
Sponsored by Department of Earth and Planetary Sciences, º«¹úÂãÎè, this Freaky Friday will be followed by the film The Day after Tomorrow. IMAGE: BBC
Free, everyone welcome. Seating is limited. No reservations necessary.
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