Unraveling the Mystery of Earth's Water

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Exploring the origins of Earth's water, this chapter delves into theories of its delivery after the planet cooled down, potentially through comet impacts from the outer solar system. It discusses the unique signature of water molecules and how studying hydrogen isotopes can reveal the source of Earth's water, challenging traditional views of planetary formation. The narrative also explains the critical role of Jupiter and Saturn in the formation of Earth's water through a series of cosmic events.

Life as we know it needs water, but scientists can’t figure out where Earth’s water came from. Answering that question is just one piece of an even bigger mystery: “Why are we here?” (Updated from 2023)

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