Evolution - Lesson 15 - Part 2 of 8

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Uploaded by on Apr 18, 2008

Host; Dr. David Pearson.
Part 2 Evolution -- 15-Part2
•Algae in the fossil record
•Oxygen in the atmosphere in the fossil record.
•Dates of life;
•Accumulation 4.6 billion years ago
•Life 3.6 6 billion years ago
•Oxygen ocean 3.3 6 billion years ago
•Oxygen Atmosphere 1.8 6 billion years ago
•Critical oxygen 0.6 6 billion years ago
•Stanley Miller 1953 conducted a experiment producing early life in a flask.
•Early atmosphere; Methane, ammonia, water, hydrogen discharged a spark.
•New material made -- 3 amino acids

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  • Wow! I'm going to watch all of these. Thanks.

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