Mathematical equations have shaped our understanding of the universe, and these nine have played a key role in changing the world.

Ophelia Bauckholt was killed in a shootout with U.S. Border Patrol agents in northern Vermont — an unlikely end to a life ...

At 88, historian David Levering Lewis, a biographer of W.E.B. DuBois, has filled in gaps in his knowledge of his own family line, and he takes readers along on the journey.