Why do we have a leap day every four years? What's the story of 'leap year skip'
Leap years hold a vital scientific purpose, aiming to align Earth's orbit with the human calendar
$2 banknotes could be worth up to $4,500, says US Currency Auctions
US Currency Auctions reports that $2 bills from 1890 with a brown or red seal could fetch up to $4,500 http://dlvr.it/Syf3pT
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