The lunar impact vapor paradox Paul H. Warren 1 , Edward D. Young 1,2 , Eric Tonui 1,2 and William I. Newman 2,3,4 1 Institute of Geophysics, 2 Earth & Space Sciences Department, 3 Department of Physics and Astronomy, and 4 Department of Mathematics UCLA, Los Angeles, CA 90095-1567 (pwarren@ucla.edu ) Submitted to Icarus, Feb 2008 Manuscript consists of text (37 pages), 2 tables, and 10 figures.