Book excerpt: "From roaring waterfalls and crashing waves to gentle rain and billowing clouds, water pervades our planet's majestic biosphere. It is easy to take for granted. But this ever-present substance is amazingly fit in a myriad of ways to sustain life on Earth, especially human life ... In [this book], Denton delves deep into this grand, untold story and explores how water is specially equipped to allow life to flourish on our blue planet"--Back cover.