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Whispers of the elusive particles are becoming stronger with a series of signals that appear to be zeroing in on a leading contender.
Decades of confounding experiments have physicists considering a startling possibility: The universe might not make sense.
An interview with the Nobel Prize-winner David J. Gross on the confusing state of theoretical physics.
As the elegant theory of supersymmetry continues to fail experimental tests, physicists debate whether to change course and what the future holds for particle physics.