Aretha Franklin, whose voice was rightfully declared a natural resource by her home state of Michigan, was born 80 years ago today. Today's Daily Drop celebrates her legacy by taking a tour through career highlights and offers sources to learn even more about the one and only Queen of Soul.

Read her autobiography Aretha: From These Roots, Respect: The Life and Times of Aretha Franklin by David Ritz, The Queen Next Door: Aretha Franklin, An Intimate Portrait by Linda Solomon, watch  ...