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Exobiology
Branch (SSX) Overview
The BranchÄs research
focuses on the advancement of the scientific understanding of the origin and distribution
of life by conducting research on the cosmic history of biogenic compounds, prebiotic
evolution, and the early evolution of life. This is accomplished via laboratory
experiments, theoretical studies/computational modeling, and field investigations.
Branch personnel are also involved in the development of flight instruments, experiments,
and small mission definition with particular emphasis being placed on studies
of Mars and the development of instrumentation for martian flight missions. Several
Branch scientists are part of a task module that is a component of the Ames membership
in the Astrobiology Institute. Branch scientists provide expertise in exobiology,
astrobiology, planetary protection, and other areas of planetary science to NASA
Headquarters and external review and advisory panels, and some serve as editors
and associate editors of scientific journals.
Exobiology studies includes
the history, distribution, and chemistry of biogenic elements in the solar system;
prebiotic chemical evolution and the origin of life; and the history of EarthÄs
early biosphere as recorded in microorganisms and ancient rocks. The research
is conducted both on Earth and in space. The Branch also serves as the center
of expertise within the agency for issues of planetary protection. As the agency
lead center in exobiology, Branch exobiologists exercise a leadership role in
NASAÄs Exobiology Program through program planning, performance reviews, advisory
services to related NASA programs, and external relations.
David Blake
Chief, Exobiology Branch (SSX)
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