I'm reading Randall Munroe's book How To: Absurd Scientific Advice for Common Real-World Problems. I probably don't have to tell you this, but it's awesome (as is everything from Randall Munroe, the ...

A kite is symmetrical. So it has two opposite and equal angles.

Kites have lifted us since ancient times, providing thrills, beauty, and utility. They have been used all over the world for communication, recreation, science, transport, industry, and even energy ...