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Maths in a minute: Equal temperatures
At any point in time there are two points on the Earth's equator with the same temperature.
In normal life higher dimensions smack of science fiction, but in mathematics they are nothing out of the ordinary.
The great thing about geometry is that you can sometimes prove things using pictures. Enjoy these three great visual proofs of Pythagoras' theorem!
How to arrange oranges in higher dimensions.
How will the Universe end? In a big crunch? Or a big freeze? It all depends on its shape...