On this day: August 21

POSTED: 1:02 PM Aug 20 2012   UPDATED: 12:00 AM Aug 21 2014

Lincoln and Douglas square off for the first time, Oldsmobile begins production, Hawaii becomes a state, and The Mona Lisa and the Mars Observer go missing, all on this day.

OTD August 21 - Hayden Panettiere
5 / 30
NBC Universal Television

1989: Actress Hayden Panettiere, best known for the TV series "Heroes" and "Nashville," is born in Palisades, New York.

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