David Morrison: Waystations to Mars  David Morrison is a senior
scientist at the NASA Astrobiology Institute, where he
participates in a variety of research programs. Internationally
known for his research on small bodies in the solar system, Dr.
Morrison is the author of more than 135 technical papers, has
published a dozen books, and asteroid 2410 Morrison is named in
his honor. He testified before the President’s Commission on the
Moon, Mars and Beyond on April 16, 2004.  If you had to
summarize astrobiology in an elevator, in 30 seconds, (you would
say) it’s the study of how life begins and evolves – that is,
where did we come from? Does life exist elsewhere in the
universe – are we alone? And, what is life’s future on Earth and
beyond – where are we going in space? These are the defining
terms for astrobiology, but you’ll notice they also appear in
other forms in the NASA vision and mission statements.  The
rocks inside a crater on the Asteroid Eros. Numerous small
impacts on the asteroid show brown boul