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The mother of all string theories passes a litmus test that, so far, no other candidate theory of quantum gravity has been able to match.
Updated results from a Japanese neutrino experiment continue to reveal an inconsistency in the way that matter and antimatter behave.
It weighs as much as 780 million suns and helped to cast off the cosmic Dark Ages. But now that astronomers have found the earliest known black hole, they wonder: How could this giant have grown so big, so fast?
An eminent mathematician reveals that his advances in the study of millennia-old mathematical questions owe to concepts derived from physics.
Edward Witten reflects on the meaning of dualities in physics and math, emergent space-time, and the pursuit of a complete description of nature.