On this Day in History

On this Day in History in 239 B.C.E.: 1st recorded perihelion passage of Halley’s Comet.
 
On this Day in History in 1964: “Jeopardy” debuted on NBC-TV.
 
On this Day in History in 1867: US buys Alaska from Russia for $7,200,000 (2 cents an acre – Seward’s Folly).
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