By LAURA UNGAR

What makes walking so great for your health and what else you need to do

LOUISVILLE, Ky. (AP) — Janet Rapp strode briskly down a paved path through the city zoo, waving at friends and stopping briefly to greet emus she knows by name. The 71-year-old retiree start...

New DNA evidence rewrites long-told stories of people in ancient Pompeii

When a volcanic eruption buried the ancient city of Pompeii, the last desperate moments of its citizens were preserved in stone for centuries. Observers see stories in the plaster casts late...