Non-musical history for today: 1966 – The Cave of Swallows, the largest known cave shaft in the world, was discovered in Aquismón, San Luis Potosí, Mexico. The cave's floor is a 1,093 ft freefall drop from the lowest side of the opening, with a 1,210 ft drop from the highest side.

Also, it's my mother's birthday today. Happy birthday, Mom! I love you!!

Music history, album anniversaries, birthdays, and deaths for December 27.

Recorded in the Omniverus Podcast Studios at Liberty Plaza.

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