Introduction: Many Planets, One Earth: The Habitable Planet (1:44) --
Geologic Signatures of Bacteria (3:50) --
Organic Chemistry (3:01) --
Global Thermostat (4:15) --
Paradox of Glaciations (2:49) --
Driving the Carbon Cycle (3:14) --
Credits: Many Planets, One Earth: The Habitable Planet-A Systems Approach to Environmental Science (0:51)