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Story summary
- A study led by Motohiko Murakami of ETH Zurich finds Earth's core may store hydrogen equivalent to 45 oceans of water.
- It challenges the view that water arrived mainly via comets and asteroids.
- Murakami's team simulated Earth's formation in the lab and found hydrogen entered the core early.
- Hydrogen may bind within metallic iron, making today’s water only a fraction of Earth's hydrogen.
- The findings were published in Nature Communications.
