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One hundred years ago, Albert Einstein had only just published his revolutionary new theory of gravity, atomic nuclei were entirely mysterious, and quantum “theory” was a tissue of guesswork. Superconductivity, the nature of the chemical bond, and the energy source of stars were riddles that baffled physics.

And then there were the unknown unknowns: Big Bang cosmology, black holes, quarks, gluons, the triumph of symmetry and its breaking, radio, television, masers, lasers, transistors, nuclear magnetic resonance, the eruption of microelectronics and telecommunications…and, of course, nuclear bombs. We’ve come a long way. It is safe to say that 100 years ago no one could remotely have anticipated modern physics, and certainly no one did.

"Unknown unknowns?"  Do we have to enagage in Rumsfeldisms here? Pathetic. To read more, click here.