"So remember to look up at the stars and not down at your feet. Try to make sense of what you see and hold on to that childlike wonder about what makes the universe exist."
"There could be whole antiworlds and antipeople made out of antiparticles. However, if you ever meet your antiself, don't shake hands! You would both vanish in a great flash of light."
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Source: Stephen W. Hawking (1990). “A Brief History of Time: From the Big Bang to Black Holes”, Bantam
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