Discover More →
SCIENCE

Artificial quantum-light swimmer moves upstream in a light stream

An artificial swimmer made from quantum light moved upstream in a quantum stream of light, according to New Scientist. The report says the result appeared to break the reciprocal action-and-reaction principle associated with Newton’s third law, though the supplied account does not provide details about the swimmer’s design, speed, or experimental setting.

Illustrative photo · Photo by Johannes Plenio · Pexels

An artificial swimmer made of quantum light moved upstream in a quantum stream of light, New Scientist reported on September 21, 2026.

The report said the motion appeared to break Newton’s third law, which states that actions are paired with reciprocal reactions. The supplied account does not describe how the swimmer was created or how the movement was measured.

THE QUESTIONS THIS EVENT LEAVES BEHIND

What conditions allowed the swimmer to move upstream in the quantum light stream?

How was the reported motion measured and compared with Newton’s third law?

What limitations or alternative explanations were considered for the result?

Could the effect be reproduced outside the reported experimental setting?

YOUR QUESTION

Does this story leave you with another question?

Send us the question the report did not answer. It may become the next question IAQ investigates.

GLOBAL CURIOSITY MAP · AUGUST 2026

What Was the World Curious About That Month?

10 places and 10 questions from IAQ's monthly record of Science curiosity.
Explore the Full Global Curiosity Map

23 September 2026 · 04:38 · 1 sources

Sources

newscientist — Swimmer made of quantum light breaks Newton’s third law

SHARE THIS REPORT

CITY GUIDE Tokyo Travel Questions Explore a city through the questions that shape the experience. GLOBAL CURIOSITY Global Curiosity Map See what the world is curious about right now. EVERYDAY LANGUAGE Global Banter Atlas Discover the playful expressions people use around the world. CONNECTED QUESTIONS Question Families Follow questions that belong to the same line of curiosity. HIDDEN MECHANISMS IAQ Lexicon Explore the mechanisms hiding behind everyday questions. SELECTED QUESTIONS Hall of Fame Questions that changed how IAQ looked at something familiar. A THOUGHT FROM IAQ
Resources change value depending on constraints.
Follow the thought back to the question that produced it.
INVESTIGATIONS 007 IAQ Follow questions far enough and they begin investigating each other.
💭 Quiet Stream