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        Part of NOVA
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        Einstein's Thoughts on the Ether

        At the turn of the 20th century, most scientists believed that light traveled through an invisible form of matter they called ether. Einstein disagreed. He asserted that light waves, unlike other waves, could exist where no matter was present. As this video adapted from NOVA shows, the repeated failure of scientists to prove ether's existence helped confirm Einstein's unconventional thinking.

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