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Physics

See the latest physics news and expert analysis on dark matter, the multiverse, theoretical and particle physics, quantum theory, and more from the world of physics.

Illustration of a clock in a spiral

Physics

Time loops may not be forbidden by physics after all

Physicists find that causal loops, where two events separated in time influence each other in paradoxical ways, are allowed in many theoretical universes, some of which share features with our own

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DNA turbine

Physics

Tiny nanoturbine is an autonomous machine smaller than most bacteria

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Physics

Ten years after the Higgs discovery, what now for particle physics?

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Antibubbles are a blob of liquid with a layer of air surrounding them

Physics

Antibubbles have been made to last a record-breaking 13 hours

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Neutron star

Physics

Elusive exotic matter called a tetraneutron possibly seen in the lab

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Fruit display in a street market

Physics

Physicists work out exactly when a fruit display will fall down

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A rabbit hologram levitated above a 3D printed rabbit

Physics

3D rabbit ‘hologram’ created by levitating screen using sound waves

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This fluid can be a liquid and solid at the same time

Physics

Watch this strange fluid act like a solid and liquid at the same time

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Physics

Contemplating the mysteries of the fourth dimension is time well spent

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JILA?s three-dimensional (3-D) quantum gas atomic clock consists of a grid of light formed by three pairs of laser beams. A stack of two tables is used to configure optical components around a vacuum chamber. Shown here is the upper table, where lenses and other optics are mounted. A blue laser beam excites a cube-shaped cloud of strontium atoms located behind the round window in the middle of the table. Strontium atoms fluorescence strongly when excited with blue light.

Physics

Jun Ye interview: What use is the world’s most accurate clock?

The most advanced atomic clocks don鈥檛 just tell time 鈥� they could soon get so ludicrously accurate that they could be used for detecting gravitational waves and testing the limits of relativity

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Physics

Will we ever unite physics? Clocks in superposition could offer clues

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Physics

Will time ever end? The answer lies in the death throes of the cosmos

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Physics

What is time? The mysterious essence of the fourth dimension

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Physics

Could we ever go back in time? Relativity does not rule it out

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