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Aliens Aren’t Little Green Men, They’re Purple People Eaters: Some exoplanets, especially those orbiting cooler red dwarfs, might host purple plant life rather than the green-hue vegetation found on Earth.

We might have had it wrong this whole time.

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Some 'Water World' exoplanets might be covered in carbonaceous materials instead. (Original title: Are Water Worlds Just Made of Soot?)

Earth’s Lithosphere was Already Segmented and Mobile 3.5 Billion Years Ago

Not every forest cools the Earth | A new study by researchers at ETH Zurich shows that the location of reforestation is often more crucial than the number of trees.

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