Big Bang - time and space created. infinitely dense and hot.
10^-35s - no matter, EM gamma (10^28 K)
10^-6s - 1st fundamental particle
10^-3s - hadrons created (protons and neutrons)
1s - creation of matter stops (10^9 K)
100s - protons and neutrons fuse. 25% is helium
380,000 years - universe cools, first atoms form, microwave background radiation
30m years - stars form, nuclear fusion, heavier atoms created
200m years - galaxy forms
9b - solar system created, planets (1b years after sun), life on earth (another 1 billion years)
13.7b years (now) - 200,000 years ago humans evolve (2.7 K)
