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13 world-changing ideas that came from dreams (literally)

From classic novels to scientific breakthroughs to box-office blockbusters, some of our most important innovations were inspired by our subconscious.

The Periodic Table
The Periodic Table
Getty Images

Russian chemist Dmitri Mendeleev was exhausted from three days of trying to classify the 56 elements when he decided to sleep on it. “I saw in a dream a table where all the elements fell into place as required. Awakening, I immediately wrote it down on a piece of paper,” Mendeleev wrote in his diary, “Only in one place did a correction later seem necessary.” What sort of things do you dream about? The answer can be very revealing about you.
 



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