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Old 01-10-2008, 08:05 AM   #1
Cheese
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Default Plate tectonics "key to life on earth".

If Earth had been slightly smaller and less massive, life might never have gained a foothold. The forces that move continents and build mountains. And the more massive a world is, the thinner its plates are. Thinner plates are weaker and more easily moved and so able to support the kinds of crucial planet-shaping plate tectonics experienced on this planet over the billions of years that life evolved from simple one-celled organisms to complex creatures that can fly, swim and read.

Scientists: Earth Barely Supports Life


Interesting read...
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