![A metal claw reaches for a round nodule on the seafloor.](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2024/07/072224_sp_seafloor-o2_feat.jpg?fit=1030%2C580&ssl=1)
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.
By Sid Perkins