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@number6

Klein's bottle: the reason why the topologist died in the desert.

They tried to fill it with water, but every time they poured some in, it was out.

@yours_truly

@mina @yours_truly

I thought he died because he mistook his water cup for a doughnut and ate it.

Mina

@number6

You don't die from eating a crunchy doughnut.

Your teeth might suffer, though.

@yours_truly