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Oceans

In a seafloor surprise, metal-rich chunks may generate deep-sea oxygen

Instead of sinking from the surface, some deep-sea oxygen may be created by battery-like nodules that split water into hydrogen and oxygen.

Space

A planet needs to start with a lot of water to become like Earth

Rocky planets around fiery stars could hide their water for later use, but it takes 3 to 8 times the amount in our world’s oceans to end up Earthlike.

Physics

Can light spark superconductivity? A new study reignites debate

Brief blasts of light might make some materials into fleeting superconductors. Magnetic measurements strengthen the case for this controversial claim.