In 1936 a German chemist identified certain organic molecules that
he had extracted from ancient rocks and oils as the fossil remains
of chlorophyll--presumably from plants that had lived and died
millions of years in the past. It was another twenty-five years
before this insight was developed and the term "biomarker" coined
to describe fossil molecules whose molecular structures could
reveal the presence of otherwise elusive organisms and processes.
Echoes of Life is the story of these molecules and how they are
illuminating the history of the earth and its life. It is also the
story of how a few maverick organic chemists and geologists defied
the dictates of their disciplines and--at a time when the natural
sciences were fragmenting into ever-more-specialized
sub-disciplines--reunited chemistry, biology and geology in a
common endeavor. The rare combination of rigorous science and
literary style--woven into a historic narrative that moves
naturally from the simple to the complex--make Echoes of Life a
book to be read for pleasure and contemplation, as well as
education.
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