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A first-of-its-kind test shows that reusing energy within a computer chip can work, thanks to two techy tricks.

Spotted ratfish, or "ghost sharks," have forehead teeth that help them grasp onto mates. It's the first time teeth have been found outside of a mouth.

Exploring the relationship between cancer cells and nerve cells, which can signal tumors to grow, could unearth ways to slow disease.

Building blocks of life have been found on this moon of Saturn. They may come from chemical reactions beyond Enceladus' possible life-supporting ocean.

A reptile fossil is the first of its kind with skin and partially webbed feet, possibly showing how later species like plesiosaurs adapted to water.