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  • Bill Phillips celebrates a beautiful reformation of the metric system, by which scientists measure the physical world, coming into effect on World Metrology Day, 20 May 2019.

    • William D. Phillips
    Measure for Measure

  • If you were ever puzzled about the fact that the detectors at the Large Hadron Collider record huge datasets despite the tiny probability of two protons colliding, this is for you. Steven Goldfarb and Katarina Anthony connect the dots.

    • Steven Goldfarb
    • Katarina Anthony
    Measure for Measure

  • In 2016, Peter Trueb computed 22.4 trillion digits of π. Ahead of π Day on 14 March, he reflects on the nature of π and its role in mathematics, science and philosophy.

    • Peter Trueb
    Measure for Measure

  • Beer is a high-quality product that comes with a dedicated set of units. Stefanie Reichert and Bart Verberck elaborate on the most common ones.

    • Stefanie Reichert
    • Bart Verberck
    Measure for Measure

  • Artificial intelligence is set to rival the human mind, just as the engine did the horse. José Hernández-Orallo looks at how we compare cognitive performance.

    • José Hernández-Orallo
    Measure for Measure

  • Bart Verberck reflects on measuring the speed of light, its role in metrology, and special relativity.

    • Bart Verberck
    Measure for Measure

  • Understanding the muon’s magnetic moment holds the key for unlocking potential new physics, as Thomas Teubner shows.

    • Thomas Teubner
    Measure for Measure

  • October 23 is (unofficially) known by some chemists as Mole Day. Andrea Taroni attempts to get to grips with the concept of the mole itself, and the imminent change to its definition.

    • Andrea Taroni
    Measure for Measure

  • Solid angle is an ancient notion with modern relevance. A one-page primer by Ben Kravitz.

    • Ben Kravitz
    Measure for Measure

  • Richard Davis refreshes our memory on the venerable metre.

    • Richard Davis
    Measure for Measure

  • Hans-Georg Menzel walks us through the complex set of units characterizing radioactivity and ionizing radiation.

    • Hans-Georg Menzel
    Measure for Measure

  • Tests of one of the most fundamental theories in physics reveal an issue with the size of the proton — or the Rydberg constant. Thomas Udem explains.

    • Thomas Udem
    Measure for Measure

  • Michael Jentschel and Klaus Blaum explain why the most famous equation of physics needs checking — and how to do it.

    • Michael Jentschel
    • Klaus Blaum
    Measure for Measure

  • Mark Keller explains how the elementary charge will soon be reinstated in metrology — and why it got sidelined in the first place.

    • Mark W. Keller
    Measure for Measure

  • How do you define colour? Nina Meinzer casts light on the vision it takes.

    • Nina Meinzer
    Measure for Measure

  • A nuclear clock could outperform atomic clocks, but its development has turned out to be a formidable task, writes Marianna Safronova.

    • Marianna Safronova
    Measure for Measure

  • Jay Hendricks tells about ongoing work to change the realization and dissemination of the pascal, which will lead to the elimination of mercury-barometer pressure standards.

    • Jay Hendricks
    Measure for Measure

  • The arrival of a new type of timekeeper heralds the end of the second as we know it, as Helen Margolis explains.

    • Helen Margolis
    Measure for Measure

  • Wonder material graphene makes metrology practical and relaxed, says Andre Geim.

    • Andre Geim
    Measure for Measure

  • Dimensional analysis is a powerful tool for assessing physical problems, reaffirms Tina Hecksher

    • Tina Hecksher
    Measure for Measure