SAO PAULO (AP) — Sloths weren’t always slow-moving, furry tree-dwellers. Their prehistoric ancestors were huge — up to 4 tons (3.6 metric tons) — and when startled, they brandished immense claws.For a...

WASHINGTON (AP) — Long before the ancient Maya built temples, their predecessors were already altering the landscape of Central America’s Yucatan peninsula.Using drones and Google Earth imagery, archaeologists have discovered a 4,000-year-old...