David Dvorkin
David Dvorkin (born October 8, 1943) is a UK writer of speculative fiction, now living in the US. Dvorkin earned a BA in mathematics and physics from Indiana University as well as an MS in mathematics from the University of Houston. He worked at NASA (1967-1971) as an aerospace engineer on Apollo 8 through Apollo 15, and at Martin Marietta (1971-1974) on the Viking Mars program.