Mathematics – Logic
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20923702w&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #237.02; Bulletin of the American Astronomical Society,
Mathematics
Logic
Scientific paper
The history of life since the advent of animals is one of rapid evolution by more complex animals and plants in response to changing environmental conditions. While the overall history of animals and plants from the Cambrian until the present has been well known for decades, it is in the history of the environmental changes that newer progress has been made. Understanding the changes in global temperature, oceanic chemistry, and atmospheric composition require more sophisticated analyses than simply charting the presence of absence of particular organisms as represented by their fossil record. In this talk I will concentrate on new environmental findings concerning the oceans and atmosphere over the last 500 million years that had only newly appreciated and major effects on not only the composition of flora and fauna, but on the very origination and extinction rates of these organisms. The role of oxygen and hydrogen sulfide in evolution and extinction are particularly interesting as lessons learned from their history on Earth have important Astrobiological implications for the frequency of advance life in the Universe.
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