Habitable Planet (2007) | Index |
|
4:00 | Disc 1 Unit 1: Many Planets, One Earth Rise of oxygen 2,5 BYA - 580 MYA | 5:20 | Stromatolites 3.5 BYA seen today in Bahamas, Australia | 7:00 | Banded iron formed 1.8 BYA |
7:40 | Iron entered through geothermal vents | 10:15 | Sterol indicates eukaryotes | 11:00 | Oxygen is required in chemical pathway |
13:00 | Snowball earth : gliciers in Namibia; though solar radiation has increased 30% in 3.5 BY. | 16:00 | Volcanic activity provides CO2, weathering (temperature-dependent) consumes it - global thermostat. | 18:15 | Partial ice age 580 MYA left rocks in till (Squantum, Massachusetts), followed by sedimentary layers |
22:00 | 2 episodes of Snowball earth 710 and 635 MYA. | 22:30 | Continents aound equator: weathering removes CO2 - global cooling | 23:00 | Albedo leads to snowball earth. |
24:00 | Plate tectonics counteracts albedo to warm earth, Cambrian explosion 530 MYA | 0:00 | Disc 1 Unit 2: Atmosphere | 0:00 | Disc 1 Unit 3: Oceans |
0:00 | Disc 1 Unit 4: Ecosystems | 0:00 | Disc 2 Unit 5: Human Population Dynamics | 0:00 | Disc 2 Unit 6: Risk, Exposure, and Health |
0:00 | Disc 2 Unit 7: Agriculture | 0:00 | Disc 2 Unit 8: Water Resources | 0:00 | Disc 3 Unit 9: Biodiversity Decline |
0:00 | Disc 3 Unit 10: Energy Challenges | 0:00 | Disc 3 Unit 12: Earth's Changing Climate | 0:00 | Disc 4 Unit 13: Looking Forward: Our Global Experiment |
Index | Nov 16, 2010 | Peter Chen |