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Physics

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Closeup photo of an automated two-wheeled robot on a wooden table
mathematical physics

A New Theory for Systems That Defy Newton’s Third Law

By Stephen Ornes
November 11, 2021
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In nonreciprocal systems, where Newton’s third law falls apart, “exceptional points” are helping researchers understand phase transitions and possibly other phenomena.

Galaxies in triangular formations expanding.
cosmology

Laws of Logic Lead to New Restrictions on the Big Bang

By Charlie Wood
November 10, 2021
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Physicists are translating commonsense principles into strict mathematical constraints on how our universe must have behaved at the beginning of time.

planetary science

Researchers Revise Recipe for Building a Rocky Planet Like Earth

By Jonathan O'Callaghan
November 3, 2021
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Over the past decade, researchers have completely rewritten the story of how gas giants such as Jupiter and Saturn form. They’re now debating whether the same process might hold for Earth.

Illustration of labyrinth with a large sphere representing the neutrino at center. People with flashlights explore the paths.
particle physics

Is the Great Neutrino Puzzle Pointing to Multiple Missing Particles?

By Thomas Lewton
October 28, 2021
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Years of conflicting neutrino measurements have led physicists to propose a “dark sector” of invisible particles — one that could simultaneously explain dark matter, the puzzling expansion of the universe, and other mysteries.

quantum physics

An Ultra-Precise Clock Links the Quantum World With Gravity

By Katie McCormick
October 25, 2021
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Time was found to flow differently between the top and bottom of a single cloud of atoms. Physicists hope that such a system will one day help them combine quantum mechanics and Einstein’s theory of gravity.

Illustration of a figure working on a laptop surrounded by flasks and liquids evaporating into discrete shapes in the air.
Quantized Columns

The Uselessness of Useful Knowledge

By Robbert Dijkgraaf
October 20, 2021
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Today’s powerful but little-understood artificial intelligence breakthroughs echo past examples of unexpected scientific progress.

astrophysics

A Hint of Dark Matter Sends Physicists Looking to the Skies

By Jonathan O'Callaghan
October 19, 2021
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After a search of neutron stars finds preliminary evidence for hypothetical dark matter particles called axions, astrophysicists are devising new ways to spot them.

Q&A

The Astronomer Who’s About to See the Skies of Other Earths

By Thomas Lewton
October 12, 2021
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After the ultra-powerful James Webb Space Telescope launches later this year, Laura Kreidberg will lead two efforts to check the weather on rocky planets orbiting other stars.

Nobel Prize

Work on Earth’s Climate and Other Complex Systems Earns Nobel Prize in Physics

By Natalie Wolchover
October 5, 2021
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Syukuro Manabe and Klaus Hasselmann have been honored for their work that led to reliable predictions of the effects of climate change. They will share the Nobel with Giorgio Parisi, who has made pioneering studies of chaotic physical systems.


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