Earth is a haven for water in our solar system. While only a small fraction of our water is drinkable, roughly 70 percent of our planet is covered in oceans, lakes, rivers, swamps, and other sources of our most precious liquid. Water is essential for life as we know it. What's frightening is that we know very little about how water got here in the first place.
Comet Delivery, or 'Born Wet'?
Enter a New Idea
Written by Elizabeth Howell September 14, 2018
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