Time travel and chemical evolution:  a look at the outer solar system.
Many space scientists think that the chemical conditions today on planets and moons of the outer solar system are similar to conditions on Earth soon after it formed.  If so, we can learn much about the chemistry that led to life on this planet.  We can also speculate about exotic habitats that might have given rise to other types of life.  And if we are able to discern the chemical reactions now occurring in the outer solar system, we may be able to extrapolate these rules to other solar systems, and so define the habitable zones around other stars where the potential for life is high.
Owen
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State University of New York at Stony Brook, USA.
D055598:Chemical Phenomena; D002621:Chemistry; D018559:Exobiology; D005118:Extraterrestrial Environment; D018538:Jupiter; D018535:Mars; D019110:Meteoroids; D000069497:Origin of Life; D016083:Planets; D018539:Saturn; D016082:Solar System; D018536:Venus