Mike Mottl is a Professor in the Department of Oceanography and a
member of the NASA Astrobiology Institute.  In his 30-year career he
has participated in 28 oceanographic research cruises and spent nearly
three years at sea. He has made 22 deep ocean dives, to a maximum depth
of 4000 m, in three different manned submersibles, and has worked
extensively with remotely-operated vehicles (ROVs). His research
interests include geochemical cycles, geochemical implications of plate
tectonics, interaction of seawater with the oceanic crust, and fluids
in subduction zones.