Happy birthday #physicist Chien-shiung Wu (1912-1997), who came up with a truly beautiful experiment to test whether the weak force conserves parity (whether beta decay would be the same if reflected in the mirror)! ๐งช๐ก๐ฉ๐ปโ๐ฌ #histsci In my print on the left I show Wu in her lab & a schematic diagram of