MARK GARLICK / SCIENCE PHOTO LIBRARY MARK GARLICK / SCIENCE PHOTO LIBRARY
Global warming, illustration. The Earth will start to become uninhabitable long before the Sun itself dies. In about one billion years the Sun will be about 10 per cent more luminous than today. Dry watering holes, like the one shown here, will be a lot more common then than they are now, as the planet slowly becomes a hot, humid graveyard for trees and large land animals.
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