In the 21st Century, the term "flat-earther" is used to describe someone who is spectacularly - and seemingly wilfully - ignorant. But there is a group of people who claim they believe the planet really is flat. Are they really out there or is it all an elaborate prank?
There are people who say they think this image is fake - part of a worldwide conspiracy by space agencies, governments and scientists.
“Circumnavigation is a case of travelling in a very broad circle across the surface of the Earth” James McIntyre (Flat-earther)
"I came to realise how much we take at face value," (another Flat – earther). "We humans seem to be pleased with just accepting what we are told, no matter how much it goes against our senses."
James McIntyre, a British-based moderator of a Flat Earth Society discussion website, has a slightly different take. "The Earth is, more or less, a disc," he states. "Obviously it isn't perfectly flat thanks to geological phenomena like hills and valleys. It is around 24,900 miles in diameter."
"Is it always good to question 'how we know what we know' ? Is it also good to have the ability to accept compelling evidence - such as the photographs of Earth from space ?"