music: What popular folk singer recorded the 1968 hit "Both Sides Now"?

Questions

Trotsky expelled from Soviet CP; Stalin becomes undisputed dictator.?

Grace Kelly (in Philadelphia, PA), actor, Princess of Monaco?

First Sunday football game in Philadelphia (previously illegal).?

First known photo of Loch Ness monster (or whatever) is taken.?

Richard H. Truly, U.S. astronaut (STS-2, 8)?