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theoretical physics
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A ‘Rebel’ Without a Ph.D.
A conversation with the mathematical physicist Freeman Dyson on quantum electrodynamics, climate change and his latest pet project.
Possible Echo of Big Bang Detected
Scientists report the possible discovery of primordial gravitational waves, ripples in space-time that carry a record of how the universe began.
Betting on the Future of Quantum Gravity
New calculations suggest physicists may someday discover a fundamental theory of gravity, but it could require a radical new perspective on the universe.
Physicists Eye Quantum-Gravity Interface
Physicists have devised experiments that can probe the interface between quantum mechanics and general relativity.
A Jewel at the Heart of Quantum Physics
Physicists have discovered a jewel-shaped geometric object that challenges the notion that space and time are fundamental constituents of nature.
Lopsided Map Offers Clues to Big Bang
Theoretical cosmologists are piecing together a cosmic origin story from a surprising anomaly in the recently released Planck satellite image.
Is Nature Unnatural?
Decades of confounding experiments have physicists considering a startling possibility: The universe might not make sense.
Waiting for the Revolution
An interview with the Nobel Prize-winner David J. Gross on the confusing state of theoretical physics.
Alice and Bob Meet the Wall of Fire
If a new hypothesis about black hole firewalls proves correct, at least one of three cherished notions in theoretical physics must be wrong.