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dark matter

Distorted galaxies
Abstractions blog

A New Cosmic Tension: The Universe Might Be Too Thin

September 8, 2020

Cosmologists have concluded that the universe doesn’t appear to clump as much as it should. Could both of cosmology’s big puzzles share a single fix?

Center of the Milky Way
Abstractions blog

An Alternative to Dark Matter Passes Critical Test

July 28, 2020

Modified gravity theories have never been able to describe the universe’s first light. A new formulation does.

The XENON1T detector’s time projection chamber.
Abstractions blog

Dark Matter Experiment Finds Unexplained Signal

June 17, 2020

Researchers say there are three possible explanations for the anomalous data. One is mundane. Two would revolutionize physics.

An image of space with lines emanating from a central point, as if the viewer is traveling at warp speed.
Abstractions blog

What Might Be Speeding Up the Universe’s Expansion?

April 27, 2020

Physicists have proposed extra cosmic ingredients that could explain the faster-than-expected expansion of space.

Swirling video.
Abstractions blog

Axions Would Solve Another Major Problem in Physics

March 17, 2020

In a new paper, physicists argue that hypothetical particles called axions could explain why the universe isn’t empty.

Gif of a spinning sphere that has a dappled blue, green and red pattern.
Abstractions blog

How Ancient Light Reveals the Universe’s Contents

January 28, 2020

A photograph of the infant cosmos reveals the precise amounts of dark matter and dark energy in the universe, leaving precious little room for argument.

An overhead shot of an engineer working on a metal tank with pipes and cables coming out of it.
Abstractions blog

Top Dark Matter Candidate Loses Ground to Tiniest Competitor

November 27, 2019

Physicists have long searched for hypothesized dark matter particles called WIMPs. Now, focus may be shifting to the axion — an ultra-lightweight particle whose existence would solve two mysteries at once.

Illustration of three flat sheets, connoting a flat universe, and three balls, connoting a closed universe.
Abstractions blog

What Shape Is the Universe? A New Study Suggests We’ve Got It All Wrong

November 4, 2019

Most every cosmologist believes the universe is flat. A new analysis argues that it’s closed.

An illustration of a planet in front of a star.
Abstractions blog

Physics Nobel Honors Early Universe and Exoplanet Discoveries

October 8, 2019

The astronomers Michel Mayor and Didier Queloz won half of the prize for their 1995 discovery of a Jupiter-like planet orbiting a nearby star. The cosmologist James Peebles won the other half for work exploring the structure of the universe.