Carolyn Marvin's disorderly conduct arrest turns a sidewalk standoff into a test case for how cities police the automation-versus-workforce debate.

A study of 100-plus European pollen records shows human abandonment of medieval farmland cut plant diversity by 40%, then restoration came from renewed human activity.

Sotheby's is auctioning Copernicus, Galileo, and Newton first editions together for the first time, a rare chance to own the scientific revolution.

JAXA's MMX spacecraft lifts off Oct. 19 to settle whether Phobos and Deimos are impact debris or captured asteroids, with NASA instruments riding along.