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A simulation of gravity showing curved space-time. The ball represents the sun and is resting on a sheet of plastic that stretches under its weight. The curved sheet of plastic demonstrates the way a gravity curves space.

Physics

The massive problem of trying to fully explain what mass actually is

I can take it as a given that people have an intuition for the meaning of mass, but traditional explanations can feel unsatisfactory. Even the standard model doesn't give us all the answers, says Chanda Prescod-Weinstein

Comment

Technology

Microsoft says its weird new particle could improve quantum computers

News

Technology

IBM quantum computer beat a supercomputer in a head-to-head test

News

Couples are less likely to physically collide with others than friends

Technology

Couples collide with fewer people on walks than pairs of friends do

News

Snakes are quite quantum, mathematically speaking

Life

Wiggly worms and quantum objects follow surprisingly similar equations

News

Extremely cold drop of helium can be levitated forever

Physics

Extremely cold drop of helium can be levitated forever

News

Technology

Situation at Ukrainian nuclear plant is dangerous, IAEA boss warns

News

The are thosands of small pieces of junk orbiting Earth (as well as thousands of satellites)

Physics

Quantum sensors could detect space debris from its gravitational pull

News

Sunlight coming out of the optical fibre

Physics

Sunlight could cool an atom to its coldest possible temperature

News

Supermassive black hole. Elements of this image furnished by NASA.; Shutterstock ID 1756053335; purchase_order: -; job: -; client: -; other: -

Space

Lab imitations of the unobservable cosmos can be genuinely insightful

Despite the obvious caveats, physicists are right to use fluids and other physical analogues to search for fresh insights about extreme cosmic phenomena, from black holes to the big bang

Leader

Space

Questions I dread: How did the universe begin, and what is space-time?

Comment

Physics

Fundamental law of physics demonstrated using quantum objects

News

Physics

Why virtual particles don’t exist but do explain reality – for now

Features

Physics

To create a wormhole that doesn't collapse, you need exotic matter

Features