Joe KirschvinkJoe Kirschvink is the Nico and Marilyn Van Wingen professor of geobiology at the California Institute of Technology in Pasadena. His pioneering work in earth science includes formulating and naming the "Snowball Earth" hypothesis. He is a fellw of the American Association for the Advancement of Science, the American Geophysical Union, and the American Academy of Arts and Sciences. He lives in Pasadena, California. Read More Read Less