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Before the 20th century, concert musicians might tune their instruments to wildly different pitches, depending on where they were playing.

Shaunacy Ferro






Guillermo Kahlo, Wikimedia Commons // Public Domain

Frida Kahlo’s life and work were defined by pain and perseverance. Read on for facts about the accident that changed her life, her famous romances, her exotic pets, and more.

Kristy Puchko




Getty Images

To Louis Armstrong's millions of fans, every note the legendary musician let loose made the world feel a bit more wonderful.

Mark Mancini