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String Theory May Create Far Fewer Universes Than Thought
Quantum Physics

String Theory May Create Far Fewer Universes Than Thought

Some physicists claim that the popular landscape of universes in string theory may not exist

By Clara Moskowitz and Lee Billings
Should the Moon Be Quarantined?
Space & Physics

Should the Moon Be Quarantined?

Nearly a half century after astronauts first visited the moon, it is once again a flash point for debates on how to safely, responsibly explore the solar system

By David Warmflash
Is Gravity Quantum?
Space & Physics

Is Gravity Quantum?

The ongoing search for the graviton—the proposed fundamental particle carrying gravitational force—is a crucial step in physicists’ long journey toward a theory of everything...

By Charles Q. Choi


  • Astroethics and Cosmocentrism

  • From the Editor

    Problems with the Multiverse

  • News

    Deep within Mars, Liquid Water Offers Hope for Life

  • Did a Stellar Intruder Deform Our Outer Solar System?

  • Neutrinos on Ice: Astronomers' Long Hunt for Source of Extragalactic "Ghost Particles" Pays Off

  • Milky Way's Black Hole Provides Long-Sought Test of Einstein's General Relativity

  • A Superconductor Scandal? Scientists Question a Nobel Prize–Worthy Claim

  • Sky Report

    Celestial Movement

  • Opinion

    Theoretical Physics Is Pointless without Experimental Tests

  • Physics Needs Philosophy / Philosophy Needs Physics

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