John S. Lewis
About John S. Lewis
John S. Lewis is Professor Emeritus of Planetary Sciences and Co-Director of the Space Engineering Research Center at the University of Arizona. He was previously a Professor of Planetary Sciences and Chemistry at MIT. He was a Visiting Associate Professor at the California Institute of Technology in 1973 and a Visiting Professor at Tsinghua University in Beijing, PRC for the 2005-2006 academic year. He is presently Chief Scientist for Deep Space Industries, an asteroid-mining company.
The Scale of Creation in Space and Time
by John S. Lewis | Dec 27, 2013 | 22 comments
