by Leonard Susskind
by Leonard Susskind and Art Friedman
July 15, 2014 Understanding how things work in the quantum world is both fun and mind-bending. Physicist Adam Frank suggests spending a minute watching this video on the wave-particle duality.
November 7, 2006 A provocative branch of physics called string theory might explain everything in the universe, such as how matter came into being and why space and time exist. But others say string theorists have zero proof to back their ideas.
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