Diff for "StevenAustad"

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Steven Austad Books

I. LONGEVITY IN THE AIR

II. LONGEVITY ON THE EARTH

How many atoms in human body?
- Total Earth biomass 550 GT carbon 5.5 x 1e2 x 1e9 x 1e6 (tonnes per gram) = 5.5e17 grams
- carbon is 12 amu and 12% of the atoms in human body
- Avogadro's number 6e23, hence one gram of human carbon is 5e22 atoms
- Associated with (100/12)*5e22 ≈ 4e21 total atoms per gram of human carbon
- Fermi estimate: Total Earth biomass 5.5e17 * 4e21 atoms = 2e39 biomass atoms if humans representative
- There are 1e22 to 1e24 stars in the universe
- Thousands of asteroids and trillions of comets and icy bodies orbit the Sun
- Perhaps 3e12 comets per star times 1e24 stars is 6e36 icy bodies in the universe, not counting unbound bodies
- that's a LOT of physics
- Both biology and physics are complicated ... or simple, if one is a simpleton

1999 Why We Age: What Science Is Discovering about the Body's Journey Through Life

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+ .'''p001 ch01 Doctor Dunnet's Fulmar'''
''I. LONGEVITY IN THE AIR''
 .'''p019 ch02 The Origin of Flight'''
 .'''p031 ch03 Pterosaurs: The First Flying Vertibrates'''
 .'''p041 ch04 Birds: The Longest-Lived Dinosaurs'''
 .'''p059 ch05 Bats: The Longest-Lived Mammals'''
''II. LONGEVITY ON THE EARTH''
 .'''p081 ch06 Tortoises and Tuataras: Longevity on Islands'''
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