Transcript The ENTIRE HISTORY of EVERYTHING

The ENTIRE HISTORY of
EVERYTHING
(Abridged)
Major Events:
 Formation of universe.
About 10 - 16 BYBP
 Formation of the Earth.
About 4 - 6 BYBP
 Appearance of simple cells.
About 3.5 - 4 BYBP
(including cyanobacteria)
 Appearance of complex cells,
including eukaryotic algae.
 Appearance of sex.
About 1 - 3 BYBP
About 1 - 3 BYBP
Major Events
 Appearance of multicellular
life including colonial Eukaryotic algae. About 1BYBP
 Cambrian explosion.
About 500 MYBP (= 0.5 BYBP)
 First land plants.
(Simple mosses and relatives)
About 450 MYBP
 First ferns and relatives
About 380 MYBP
 First conifers
About 350 MYBP
 Major extinction, end of Permian
About 350 MYBP
Major Events
 First Angiosperms
About 200 MYBP
 Major extinction, end of Mesozoic About 60 MYBP
 Appearance of Homo Sapiens.
< 1 MYBP
 Classes start, summer quarter, 2nd term July 26th
2004
 See also here (timeline graphic).
Atmosphere and Continents:
 At first: Hydrogen, (H2), Helium (He) N2 Methane (CH4)
Ammonia (NH3). No oxygen.
 Later organic compounds, then as life began to diversify,
oxygen. Produced at first by photosynthetic cyanobacteria.
Free oxygen was toxic to many species of early bacteria,
this may have encouraged endosymbiosis.
 The theory of plate tectonics has allowed scientists to
reconstruct patterns of continental drift.
Ohio Geology
 Good record of Paleozoic and Ice age
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(Cenozoic)
Poor record of Mesozoic (unconformity)
Paleozoic sediments exposed with age
increasing East > West.
Presence of up to 100 discernable cyclothems.
The oceans come in, the oceans go out. The
mountains go up, the mountains come down.
Animals and plants live, animals and plants die.
Repeat.