On this day:

1902: Pierre and Marie Curie discover the radioactive element radium

1951: A human organ is surgically replaced for the first time

Born on this day:

1889: Adolf Hitler, Austrian/German politician, Chancellor of Germany

Gone on this day:

1918 Karl Ferdinand Braun, German/American physicist, Nobel Prize laureate

1970: Shakeel Badayuni, Indian poet and lyricist