useless trivia: 51% of turns are ---------- turns.?

Questions

In 1894 Andres---------- , guitarist, born.?

In 1920 Jack---------- , actor (Believe It......Or Not), born.?

In 1922 Helen ---------- in Portland Maine, publisher (Cosmopolitan), born.?

In 1930 Planet ---------- discovered by Clyde W. Tombaugh.?

In 1930 A cow is flown (and milked in flight) for first time. Her milk was sealed in paper containers and dropped by ---------- over St. Louis, MO. I knew you'd want to know ...?