Forget Intelligent Design and creationism – anyone wishing to take irrationalism to new heights will be pleased to hear that a few thousand people still believe the Earth is flat.
A magazine feature on the BBC website introduces us to The Flat Earth Society, and you have to love the quotes they've picked up from a couple of its members.
Like John Davis, a 25-year-old computer scientist from Tennessee: "I came to realise how much we take at face value. We humans seem to be pleased with just accepting what we are told, no matter how much it goes against our senses ... the Earth is flat and horizontally infinite - it stretches horizontally forever. And it is at least 9,000 kilometres deep".
Or James McIntyre, a British flat-earther who, after pointing out that the Earth is a disc, offers his elaborate explanation for why ships don't drop off the edge of the planet: "A cursory examination of a flat earth map fairly well explains the reason - the North Pole is central, and Antarctica comprises the entire circumference of the Earth. Circumnavigation is a case of travelling in a very broad circle across the surface of the Earth."