Month → January

26
Jan

January 26: World Environmental Education Day

27
Jan

January 27, 1880 - Edison patents the incandescent lamp

27
Jan

January 27, 1970 – Death of Marietta Blau, identified traces of atomic particles that allowed protons to be distinguished from alpha particles

31
Jan

January 31, 1917 Lise Meitner and Otto Hahn discover a radioactive element called proactinium