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Stephen Hawking Quotes about Time Travel

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If time travel is possible, where are the tourists from the future?

If time travel is possible, where are the tourists from the future?

Stephen Hawking
Tourists, Time Travel, Ifs

I have experimental evidence that time travel is not possible.

Stephen Hawking
Time Travel, Evidence

Time travel may be possible, but it is not practical.

Stephen Hawking
May, Time Travel, Practicals
"Prof Michio Kaku on the science behind UFOs and time travel". www.telegraph.co.uk. March 20, 2008.

Time travel was once considered scientific heresy, and I used to avoid talking about it for fear of being labelled a 'crank.'

Stephen Hawking
Talking, Time Travel, Crank
"Abandon Earth or Face Extinction, Stephen Hawking Warns -- Again", www.foxnews.com. August 9, 2010.

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