On this day

January 15

3 verified events

1957

1957

achievement

Chien-Shiung Wu Proves Parity Violation

Physicist Chien-Shiung Wu announced experimental proof that nature violates 'conservation of parity,' overturning a basic assumption of physics; her Columbia colleagues Lee and Yang won the Nobel, but Wu-later the first woman to lead the American Physical Society-did not. (Shares Jan 15 with Gary Locke's governorship.)

1997
1998

1998

achievement

Fred Korematsu Awarded the Presidential Medal of Freedom

On January 15, 1998, President Clinton awarded Fred Korematsu the Presidential Medal of Freedom — the nation's highest civilian honor — for his lifelong stand against the WWII incarceration of Japanese Americans, which he had challenged all the way to the Supreme Court in 1944.