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Friday, February 5, 2010
First Breath: Earth's Billion-Year Struggle For Oxygen
The complex story of oxygen's rise (Image: Reso/Rex Features)
From The New Scientist:
OXYGEN is life. That's true not just for us: all animals and plants need oxygen to unleash the energy they scavenge from their environment. Take away oxygen and organisms cannot produce enough energy to support an active lifestyle, or even make them worth eating. Predation, an essential driver of evolutionary change, becomes impossible.