What should we look for to find exo-life? What does Earth's history tell us?
The areas discussed include:
|Supercontinent history||Vaalbara; Ur; Kenorland; Columbia/Rodinia; Pannotia; Gondwana/Pangaea; crustal movements|
|Rodinia||Stability for 1 billion years; 1,800 to 800 million years ago: "The Boring Billion"|
|Break-up of Kenorland and Rodinia||Effect on the oceans, life and the atmosphere|
|Oxygen Levels||4 stages; The great oxygenation event; reversion to anoxia; the rise to modern levels|
|Biological Effects||Especially the break-ups of Kenorland and Rodinia; Snowball Earths; development of complex life|
|Conclusion||Oxygen isn't what it's all about; size and constituent elements of exo-planets|