Today, the atmosphere of our neighbor planet Venus is as hot as a pizza oven and drier than the driest desert on Earth – but it wasn’t always that way.
Billions of years ago, Venus had as much water as Earth does today. If that water was ever liquid, Venus may have once been habitable.
Over time, that water has nearly all been lost. Figuring out how, when and why Venus lost its water helps planetary scientists like me understand what makes a planet habitable — or what can make a habitable planet transform into an uninhabitable world.
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