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cosmology

Shadows in the Big Bang Afterglow Reveal Invisible Cosmic Structures

By Zack Savitsky
March 13, 2023
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Cosmologists are using secondary signatures from the cosmic microwave background to map the universe’s hidden matter.

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.

Cosmic reionization video.
Abstractions blog

How the Cosmic Dark Ages Snuffed Out All Light

By Dana Najjar
March 2, 2020
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The recent discovery of some of the first galaxies in the universe illuminates the darkest era in cosmic history.

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

How Ancient Light Reveals the Universe’s Contents

By Charlie Wood
January 28, 2020
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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.

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

By Natalie Wolchover
November 4, 2019
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Most every cosmologist believes the universe is flat. A new analysis argues that it’s closed.

Art for "A Short History of the Missing Universe"
Abstractions blog

A Short History of the Missing Universe

By Katia Moskvitch
September 19, 2018
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Astronomers have known where the universe’s missing matter has been hiding for the past 20 years. So why did it take so long to find it?

astrophysics

The Last of the Universe’s Ordinary Matter Has Been Found

By Katia Moskvitch
September 10, 2018
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For decades, astronomers weren’t able to find all of the atomic matter in the universe. A series of recent papers has revealed where it’s been hiding.

Reaching for the Multiverse
Infinity and Beyond: The Ultimate Test

Multiverse Collisions May Dot the Sky

By Jennifer Ouellette
November 10, 2014
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Early in cosmic history, our universe may have bumped into another — a primordial clash that could have left traces in the Big Bang’s afterglow.

David Spergel
Q&A

A Bold Critic of the Big Bang’s ‘Smoking Gun’

By Peter Byrne
July 3, 2014
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The cosmologist David Spergel explains why a widely publicized gravitational-wave discovery could be wrong, and how the “overreaching” study could affect the public’s perception of science.

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