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Physics

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Q&A

How to Rewrite the Laws of Physics in the Language of Impossibility

By Amanda Gefter
April 29, 2021
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Chiara Marletto is trying to build a master theory — a set of ideas so fundamental that all other theories would spring from it. Her first step: Invoke the impossible.

A three-panel illustration of a starburst galaxy, an active galactic nucleus and a tidal disruption event.
astrophysics

Cosmic Map of Ultrahigh-Energy Particles Points to Long-Hidden Treasures

By Natalie Wolchover
April 27, 2021
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Ultrahigh-energy cosmic rays twist and turn on their way to Earth, which has made it nearly impossible to identify the colossal monsters that create them.

An illustration of a demon’s face.
explainers

How Maxwell’s Demon Continues to Startle Scientists

By Jonathan O'Callaghan
April 22, 2021
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The thorny thought experiment has been turned into a real experiment — one that physicists use to probe the physics of information.

Q&A

The New Historian of the Smash That Made the Himalayas

By Robin George Andrews
April 14, 2021
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About 60 million years ago, India plowed into Eurasia and pushed up the Himalayas. But when Lucía Pérez-Díaz reconstructed the event in detail, she found that its central mystery depended on a broken geological clock.

Photo of radio telescopes at the Allen Telescope Array with a starry sky featuring the Milky Way in the background.
Quantized Columns

How Radio Astronomy Reveals the Universe

By Emily Levesque
April 13, 2021
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Radio waves, longer and less energetic than visible light, give astronomers access to some of the most obscure physics in the cosmos.

A sphere swirling with many small orbs around it.
particle physics

‘Last Hope’ Experiment Finds Evidence for Unknown Particles

By Natalie Wolchover
April 7, 2021
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Today’s long-anticipated announcement by Fermilab’s Muon g-2 team appears to solidify a tantalizing conflict between nature and theory. But a separate calculation, published at the same time, has clouded the picture.

planetary science

Iceland’s Eruptions Reveal the Hot History of Mars

By Robin George Andrews
April 6, 2021
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The new volcanic fissures are more otherworldly than they first appear.

Spheres representing black holes, with small ones on top, large ones on the bottom, and one midsize example in the middle.
astrophysics

Long-Missing Midsize Black Hole Flashes Into View

By Jonathan O'Callaghan
March 29, 2021
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Black holes seemed to come only in sizes small and XXL. A new search strategy has uncovered a black hole of “intermediate” mass, raising hopes of more to come.

A mosaic of five microscope images of igneous rocks. The rocks are dappled with blue, pink, orange and multicolor inclusions.
geology

Scientists Pin Down When Earth’s Crust Cracked, Then Came to Life

By Howard Lee
March 25, 2021
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New data indicating that Earth’s surface broke up about 3.2 billion years ago helps clarify how plate tectonics drove the evolution of complex life.


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