What's up in

theoretical physics

Boucing droplet
quantum physics

Fluid Tests Hint at Concrete Quantum Reality

June 24, 2014

Surprising oil drop experiments suggest that the quantum world may not be as strange as advertised.

The arrow of time.
time

Time’s Arrow Traced to Quantum Source

April 16, 2014

A new theory explains the seemingly irreversible arrow of time while yielding insights into entropy, quantum computers, black holes, and the past-future divide.

Q&A

A ‘Rebel’ Without a Ph.D.

March 26, 2014

A conversation with the mathematical physicist Freeman Dyson on quantum electrodynamics, climate change and his latest pet project.

Bicep2 B-modes
cosmology

Possible Echo of Big Bang Detected

March 17, 2014

Scientists report the possible discovery of primordial gravitational waves, ripples in space-time that carry a record of how the universe began.

Gravitons
theoretical physics

Betting on the Future of Quantum Gravity

March 14, 2014

New calculations suggest physicists may someday discover a fundamental theory of gravity, but it could require a radical new perspective on the universe.

quantum gravity

Physicists Eye Quantum-Gravity Interface

October 31, 2013

Physicists have devised experiments that can probe the interface between quantum mechanics and general relativity.

Illustration of an amplituhedron.
theoretical physics

A Jewel at the Heart of Quantum Physics

September 17, 2013

Physicists have discovered a jewel-shaped geometric object that challenges the notion that space and time are fundamental constituents of nature.

cosmology

Lopsided Map Offers Clues to Big Bang

June 24, 2013

Theoretical cosmologists are piecing together a cosmic origin story from a surprising anomaly in the recently released Planck satellite image.

theoretical physics

Is Nature Unnatural?

May 24, 2013

Decades of confounding experiments have physicists considering a startling possibility: The universe might not make sense.