The Flat Earth Society was established in the early 1800s by the English inventor Samuel Birley Rowbotham and remains at the very forefront of 11th Century thinking. ‘Zetetic Astronomy’, as the society prefers to call it, has had to explain away many threats to its principles over the years. Things like manned missions to the moon, satellites, photographs of the (round) Earth from space, and endless series of Prof. Brian Cox’s inspirational TV shows. Still, they’ve got 121,000 likes on Facebook, and celebrities who’ve expressed anti-sphere sentiments include B.o.B, Shaquille O’Neal and Freddie Flintoff.