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The pot-stirring string theorist and quantum gravity theorist never sits still for long.
The team that discovered gravitational waves put their data online. Now an independent group of researchers claims that they’ve found what might be a serious problem.
Recent calculations tie together two conjectures about gravity, potentially revealing new truths about its elusive quantum nature.
A series of observations at the very edge of the universe has reignited a debate over what lifted the primordial cosmic fog.