Stuart Clark: It’s so clearly obvious that the world isn’t flat. We see when ships leave the harbour you can see as they gradually disappear below the horizon. You can see if you go up on top ...

Flat earthers have to bend themselves into all sorts of knots in order to convince themselves that the world truly is flat.

A group of YouTube conspiracy theorists who insisted the Earth was flat now concede that the planet could be a sphere after witnessing the 24-hour Antarctic sun for themselves. The Dec. 14 trip ...