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dark matter

A red laser beam enters a glass cube and splits in two; half of the beam continues straight ahead and the other half shoots out of the glass cube at a right angle.
particle physics

A New Tool for Finding Dark Matter Digs Up Nothing

By Thomas Lewton
March 21, 2022
Read Later

Physicists are devising clever new ways to exploit the extreme sensitivity of gravitational wave detectors like LIGO. But so far, they’ve seen no signs of exotica.

astronomy

Four Years On, New Experiment Sees No Sign of ‘Cosmic Dawn’

By Ben Brubaker
February 28, 2022
Read Later

When astronomers tried to confirm a signal from the birth of the first stars after the Big Bang, they saw nothing.

Q&A

In Search of Cracks in Albert Einstein’s Theory of Gravity

By Thomas Lewton
February 23, 2022
Read Later

Celia Escamilla-Rivera is combining large data sets with supercomputers to test general relativity against its little-known competitors.

cosmology

Cosmologists Parry Attacks on the Vaunted Cosmological Principle

By Charlie Wood
December 13, 2021
Read Later

A central pillar of cosmology — the universe is the same everywhere and in all directions — is surviving a storm of possible evidence against it.

Collage illustration of the JWST
astrophysics

The Webb Space Telescope Will Rewrite Cosmic History. If It Works.

By Natalie Wolchover
December 3, 2021
Read Later

The James Webb Space Telescope has the potential to rewrite the history of the cosmos and reshape humanity’s position within it. But first, a lot of things have to work just right.

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
Read Later

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.

astrophysics

A Hint of Dark Matter Sends Physicists Looking to the Skies

By Jonathan O'Callaghan
October 19, 2021
Read Later

After a search of neutron stars finds preliminary evidence for hypothetical dark matter particles called axions, astrophysicists are devising new ways to spot them.

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
Read Later

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.

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
Read Later

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.


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