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Mark Pennell sits at the helm of his time machine.Mark's Almanac is a 90-second time travel that highlights the world's history from the very serious to the sometimes sublime.

Mark's Almanac for December 3, 2020

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LIBRARY OF CONGRESS
Soviet Union-United States summit arrival ceremony with President H.W. Bush and Mikhail Gorbachev in 1990.

First developed by head chemist Maurice Treneer, Alka-Seltzer first appeared on this date in 1931. And it was on this date in 1989 that both U.S. President George H.W. Bush and Soviet President Mikhail Gorbachev declared the Cold War officially over.