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This Twist on Schrödinger's Cat Paradox Has Major Implications for Quantum Theory
Quantum Physics

This Twist on Schrödinger's Cat Paradox Has Major Implications for Quantum Theory

A laboratory demonstration of the classic “Wigner’s friend” thought experiment could overturn cherished assumptions about reality

By Zeeya Merali
How Many Aliens Are in the Milky Way? Astronomers Turn to Statistics for Answers
Space & Physics

How Many Aliens Are in the Milky Way? Astronomers Turn to Statistics for Answers

The tenets of Thomas Bayes, an 18th-century statistician and minister, underpin the latest estimates of the prevalence of extraterrestrial life

By Anil Ananthaswamy
NASA Has Launched the Most Ambitious Mars Rover Ever Built: Here's What Happens Next
Space & Physics

NASA Has Launched the Most Ambitious Mars Rover Ever Built: Here's What Happens Next

Perseverance will stow away rocks for eventual delivery to Earth and will listen for Martian sounds for the first time

By Alexandra Witze and Nature magazine

Departments

  • From the Editor

    The Most Confused of the Scientific Branches

  • News

    Quantum Tunneling Is Not Instantaneous, Physicists Show

  • Scientists Unveil First Ever Pictures of Multiple Planets around a Sunlike Star

  • Time's Arrow Flies through 500 Years of Classical Music, Physicists Say

  • Higgs Boson Gives Next-Generation Particle Its Heft

  • Mystery over Universe's Expansion Deepens with Fresh Data

  • This Photo of the Sun Is the Closest Ever Taken

  • Opinion

    'Unidentified Aerial Phenomena,' Better Known as UFOs, Deserve Scientific Investigation

  • Could We Force the Universe to Crash?

  • A Movie of the Evolving Universe Is Potentially Scary

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