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cosmology

Black holes of various sizes
black holes

Physicists Argue That Black Holes From the Big Bang Could Be the Dark Matter

By Joshua Sokol
September 23, 2020
Read Later

It was an old idea of Stephen Hawking’s: Unseen “primordial” black holes might be the hidden dark matter. A new series of studies has shown how the theory can work.

Distorted galaxies
Abstractions blog

A New Cosmic Tension: The Universe Might Be Too Thin

By Charlie Wood
September 8, 2020
Read Later

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?

The cyclic universe.
Abstractions blog

Big Bounce Simulations Challenge the Big Bang

By Charlie Wood
August 4, 2020
Read Later

Detailed computer simulations have found that a cosmic contraction can generate features of the universe that we observe today.

Center of the Milky Way
Abstractions blog

An Alternative to Dark Matter Passes Critical Test

By Charlie Wood
July 28, 2020
Read Later

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

Magnetic fields in the universe.
cosmology

The Hidden Magnetic Universe Begins to Come Into View

By Natalie Wolchover
July 2, 2020
Read Later

Astronomers are discovering that magnetic fields permeate much of the cosmos. If these fields date back to the Big Bang, they could solve a major cosmological mystery.

Katie Mack portrait.
Q&A

This Cosmologist Knows How It’s All Going to End

By Dan Falk
June 22, 2020
Read Later

The astrophysicist and social media phenom Katie Mack is ready to tell you about the fate of the universe.

Animation of black hole formation.
mathematical physics

New Math Proves That a Special Kind of Space-Time Is Unstable

By Steve Nadis
May 11, 2020
Read Later

Einstein’s equations describe three canonical configurations of space-time. Now one of these three — important in the study of quantum gravity — has been shown to be inherently unstable.

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?

By Thomas Lewton
April 27, 2020
Read Later

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

Multimedia

What Is the Geometry of the Universe?

By Erica Klarreich +1 authors
Lucy Reading-Ikkanda
March 16, 2020
Read Later

In our mind’s eye, the universe seems to go on forever. But using geometry we can explore a variety of three-dimensional shapes that offer alternatives to “ordinary” infinite space.


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