Flat-Earthers are back: 'It’s almost like the beginning of a new religion'

YouTube videos and spiffy websites espouse the conspiracy theory - but is the movement doomed to once again fall flat over countless schisms?

YouTube user TigerDan925 shocked his 26,000 followers recently by conceding a shocking point: Antarctica is a continent. It's not, as he previously thought, an ice wall that encircles the flat disc of land and water we call earth.

For most of us, that's not news. But TigerDan925's followers, like Galileo's 17th century critics, are outraged by his heresy. Welcome to the contentious universe of flat-Earthers - people who believe the notion of a globe-shaped world orbiting the sun is a myth.