Friedrich Nietzsche. Slightly questionable. In both his opinions and his sanity. But one of the most interesting historical figures we learned about in Advanced Placement European History.   At first glance, his ideas seem downright ap...

Personality types are categorized in two ways: introverted or extroverted. Extroverts derive energy from being in a social setting, while introverts derive energy from spending time in solitude. Shyness and introversion are di...