A few links for lectures on March 3 and March 5, 2009
March 3
Formation of planets and the Solar System
Primordial Solar System composition
Make your own
planet
Terrestrial carbon cycle
Milankovitch cycles
Evolution of CO2 and O2 in the Earth's atmosphere
Measured CO2 since 1957
March 5
Mars 1
Mars 2
Mars 3
Phase diagram of water
Mars' obliquity excusions
Erosion of Mars' atmosphere
Mars pressure vs. obliquity
Venus