Misc: The animal with the largest brain in relation to its body is the?

Questions

In 1920 Javier Perez de Cuellar, ---------- , Peru, 5th secretary-general of UN (1982-1996), born.?

In 1935 ---------- Minnesota, actress (The Birds), born.?

In 1937 Millionaire Howard Hughes sets ---------- air record (7h28m25s).?

In 1939 Ernest Hausen of ---------- sets chicken-plucking record-4.4 sec..?

In 1942 ---------- England, Broadway star (Phantom of the Opera), born.?