Hum Hist handout 1

Hum Hist handout 1 - Human History Week 2 lecture 1...

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Human History Week 2, lecture 1 Formation of the universe 1/12/10 The standard cosmological model All cultures have creation stories: since 1500 CE new, scientific version has emerged 3 huge differences between the scientific/standard cosmological model and other theories: the scientific model (1) is testable, (2) offers a mechanical theory, removing agency, and (3) decenters humanity Standard cosmological model suggests universe is about 13.7 billion (13,700,000) years old; archaeological and genetic data suggest modern humans only evolved ~150,000 years ago If 24 hours represented the history of the universe, modern humans would have existed for just 1 second The early history of the universe Initial “primordial atom”: infinitely small, dense, and hot Laws of physics don’t operate “Inflationary phase”: primordial atom expands faster than light Within first 1-millionth of a second, gravity appears, the universe cools close to absolute zero and decomposes into matter and antimatter; then matter and antimatter annihilate each other, leaving excess matter (1 part in 1 billion) and releasing vast blast of radiation Physics begins by 3 minutes after big bang; matter congeals into protons and neutrons
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This note was uploaded on 05/03/2010 for the course IHUM 69 taught by Professor Morris during the Spring '10 term at Stanford.

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Hum Hist handout 1 - Human History Week 2 lecture 1...

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