A giant mammal that lived 10,000 years ago in Brazil dug gigantic tunnels called “palaeoburrows”. And digging those tunnels required claws. Huge ones. But what could those giant creatures be? That was exactly the question geology professor Heinrich Frank asked himself while crawling through a mysterious tunnel uncovered at a construction site in Novo Hamburgo, … [Read more...] about These Massive Tunnels Were Dug by a Giant Sloth That Lived 10,000 Years Ago in South America