Who says geniuses have no sense of humor? Stephen Hawking is widely regarded as the greatest mind of our time, possibly the greatest since Albert Einstein. More than 40 years ago, he was diagnosed with ALS, and given 3 years to live, yet his sense of humor has been displayed on network television with cameo appearances on "The Simpsons," and "The Big Bang Theory." He recently made an appearance at the Sidney Opera House via hologram. When Professor Hawking took questions, he handled a surprise with his characteristic wit...

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