Guardian: They were some of the strangest animals to walk the Earth: wombats as big as hippos, sloths larger than bears, four-tusked elephants, and an armadillo that would have dwarfed a VW Beetle. They flourished for millions of years, then vanished from our planet just as humans emerged from their African homeland.
It is one of palaeontology's most intriguing mysteries and will form the core of a conference at Oxford University this week when delegates will debate whether climate change or human hunters...