Put down your wands and open a dictionary. While we're all still waiting for our Hogwarts letters to arrive, most Harry Potter fans already know several basic spells to help them through the wizarding ...

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Use of the word ‘placebo’ in a medical context is more recent than you might think. | MirageC/Moment/Getty Images Back in the 13th century, the term placebo didn’t call to mind clinical trials, sugar ...