What's your verifiable, conclusive proof for the following events?

Edmund Hillary summits Everest.
D-Day Landings.
Julius Ceaser Conquers Gaul.
Mary Queen of Scots was Executed.
Germany invaded Poland in 1939
Sputnik 1 was launched in 1958
Charles Lindenberg flew the Atlantic
Scott made it to the South Pole.

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Howling from the Shadows

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You can't reason an irrational person out of an irrational belief. --- Noclevername

Apollo: The History and the Hoax
Enter the World of Athran