Dale has been a Principal Investigator at the SETI Institute's Center for the Study of Life in the Universe since 1992. During this time, his research has focused on microbial ecosystems in extreme environments including areas of the Arctic, Antarctic, Atacama Desert, Death Valley and Siberia. Dale's research interests are with the origin, evolution and distribution of life in the universe and he has been involved with NASA's Exobiology and Astrobiology programs since the mid 1980's. From a narrower perspective, he is interested in locating, characterizing and understanding environments where physical and chemical conditions approach or exceed the tolerances for life. This includes biogeochemical processes occurring in polar lakes, oceans, and springs, or in lithic environments such as sandstones or retrogressive thaw slumps harbouring massive ground ice. Participating Scientist

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