The sphere is, according to Wikipedia, a reasonably correct model for earth. But mathematically the earth is  an oblate spheroid. An example of that would be smarties and M&Ms, spheres squished at the poles. As a result of gravitation and the rotation of earth, it is about 21 km longer than the Earth’s polar radius. This is, of course, ...

David Rumsey's gigantic collection of historical and modern maps, schematics, timelines, data visualisations, diagrams, history, time, sciences, religion is a never-ending source of wonder and inspirations. It is a bit of a trap, as I can spend days wandering around in the magical world of visualisations of history, science, culture, religion. Looking at the older ...

Maps: the time and space of the Hereford cloth of the world The Hereford Mappa Mundi is one of the oldest know, complex map of the world (Mappa = cloth Mundi = world). It dates from about 1285, and are found in the Hereford cathedral. It depicts 420 towns, 15 Biblical events, 33 animals and ...