Earth's fiery birth may have created hundreds of oceans' worth of water

Earth’s water may have been born in the planet’s fiery atmosphere rather than delivered by icy comets or asteroids. Scientists discovered that rocky pebbles reacting with hydrogen under extreme heat can produce water in minutes, potentially generating hundreds of oceans’ worth during Earth’s formation. The findings suggest that water may be a natural part of how rocky planets form, rather than something that must arrive from space.

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