Sloths appear to have life figured out, and once the details are revealed, being envious makes sense. These tree-dwelling mammals have survived for millions of years by doing things their own way, and ...

Tourists in Costa Rica recently witnessed a magical and elusive event—the birth of a three-toed sloth. Steven Vela, a guide with the company Canoa Aventura, spotted the brown-throated sloth (Bradypus ...