The solar system

[youtube] A pretty interesting model of our solar system. Worth watching and thinking about it. Vortex was a thing that Descartes already thought about Part 2 [youtube]

The full story of maths. Marcus de Sautoy – BBC four

Chapter 1: The language of the universe [youtube=] Chapter 2: The genius of the east [youtube=] Chapter 3: The forntiers of space [youtube=] Chapter 4: To infinity and beyond [youtube=]