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Images of a volcano taken from the International Space Station are useful to geologists because they detail the early stages of eruption, and useful to the rest of us because they are awesome.
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Volcanic activity billions of years ago set the stage for Earth's oxygen-rich atmosphere, research suggests - MSNIt is widely believed that Earth's atmosphere has been rich in oxygen for about 2.5 billion years due to a relatively rapid increase in microorganisms capable of performing photosynthesis.
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