The president of the Palestinian Authority addressed the U.N. General Assembly by video after the U.S. denied him a visa. By Parin Behrooz In a remote address to the U.N. General Assembly yesterday, ...

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For over two millennia, mathematicians agreed on one thing: you can’t use trigonometry to prove Pythagoras’ Theorem—because trigonometry is built on it. That logic, drilled into students and scholars ...

These quizzes are about the basic adult things everyone should know, but school didn't bother to teach us. We may never know how to balance a checkbook, but at least we know the Pythagorean Theorem.