Alfred Kastler revolutionized atomic physics by developing optical pumping, a method that allowed scientists to manipulate the energy states of atoms using light. His research provided the essential foundation for the invention of the laser and the development of highly precise atomic clocks, tools that now underpin modern global navigation and telecommunications.
January 7, 1984
42 years ago
What Else Happened on January 7
Caesar heard the Senate's ultimatum and grinned. Twelve years of political maneuvering had led to this moment. The tribunes Mark Antony and Quintus Cassius race…
The Byzantine palace looked more like a street brawl. Nikephoritzes, the tax collector everyone despised, was about to learn how much people hated him. Crowds s…
He was 26 and stepping into a kingdom shaped by his father's careful political maneuvering. Alfonso IV would become known as the Brave, but not for battlefield …
French forces under the Duke of Guise seized Calais, ending over two centuries of English rule on the continent. This swift victory stripped England of its fina…
He wasn't born royal. Boris Godunov clawed his way from court advisor to absolute monarch through a web of cunning and calculated moves. And when Tsar Feodor I …
The entire settlement went up like kindling. Just nine years after its founding, Jamestown—the first permanent English colony in North America—burned to the gro…
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