L & S C30Y Lecture Notes - Lecture 3: Isaac Asimov, Pre-Existence, Glutamic Acid
24 Jan 2017
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Bio for voters lecture 3 in the beginning1/24/2017 2:05:00 pm. Origin of the earth and life on it. A primer on atoms, molecules and the rna world. Among competing hypotheses, the hypothesis with the fewest assumptions should be selected. Does life require water: there really is not fundamental requirement for water. An energy-dependent, self-replicating, localized decrease in entropy isaac asimov, 1970s. Universe is about 14 billion years old no stars for first 400 million years: everything was in such a high energy state. Heavy elements from novae and supernovae: death of stars provided the stuff that we are made. Lots of organic chemistry on interstellar dust. Panspermia life came to earth from somewhere else: did life on earth start here or did it come from us in the cosmos, mccone hall might have a piece of mars. Earth and moon formed by collision 4. 53 billion years ago that melted both any earlier life vaporized (two mars-sized)
