There was a discussion some time back about creating a pen to write in space between the US and Russia. After a while, and after spending a few millions of dollars, the US came up with a brilliant pen, while the Russians used a pencil -- solved the problem a few million dollars cheaper.
I have finally discovered why the US went to so much trouble to design the pen. It stems from how they were thought 1+1 = 2 in school.
Read this powerpoint and you will understand why : Intro to Applied Maths
-kbg-
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