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Where Gravity Is Weak and Naked Singularities Are Verboten
Recent calculations tie together two conjectures about gravity, potentially revealing new truths about its elusive quantum nature.
Roberto Peccei and Helen Quinn, Driving Around Stanford in a Clunky Jeep
The two physicists who introduced Peccei-Quinn symmetry came up with their idea on and around Stanford University’s campus 40 years ago.
Rainer Weiss, Remembering the Little Room in the Plywood Palace
The physicist who designed the LIGO experiment that detected gravitational waves still holes up in a small basement lab surrounded by electronics and optical instruments.
Dark Matter Recipe Calls for One Part Superfluid
A different kind of dark matter could help to resolve an old celestial conundrum.
A Theory of Reality as More Than the Sum of Its Parts
New math shows how, contrary to conventional scientific wisdom, conscious beings and other macroscopic entities might have greater influence over the future than do the sum of their microscopic components.
Latest Black Hole Collision Comes With a Twist
The Advanced Laser Interferometer Gravitational-Wave Observatory’s third detection further compounds the mystery of why black holes collide.
Journey to the Birth of the Solar System
Join David Kaplan on a virtual-reality tour showing how the sun, the Earth and the other planets came to be.
Discoveries Fuel Fight Over Universe’s First Light
A series of observations at the very edge of the universe has reignited a debate over what lifted the primordial cosmic fog.
A Defense of the Reality of Time
Time isn’t just another dimension, argues Tim Maudlin. To make his case, he’s had to reinvent geometry.