Board Thread:Off Topic/@comment-17897872-20150919044523/@comment-4190624-20150919050439

#1 (Astronomy) Halley's comet? (y no points in the question '-')

#2 (History) World War II killed many innocent people. (idk)

#3 (Trivia) 10/10 (y no points in the question '-')

Lucky Prime Hint: 73