History
-4.0 billion Abundant liquid water, massive floods, rivers, rain, seas in northern lowlands
-4.5 billion Condensation from protosolar nebula
-3.9 billion Heavy cratering (like Earth)
-2.5 billion Extensive volcanism in northern hemisphere covers craters
-3 billion Weak plate tectonics builds Tharsis Bulge and Valles Marineris
-1.3 billion Renewed volcanic activity produces Olympus Mons
Loss of atmosphere, H2O to ice & space
Life Evolves in northern seas
Life destroyed by Sun’s UV radiation
Fossils of early life buried by lava