The Bullet Cluster of galaxies might only have half as much dark matter than scientists thought, or perhaps even none at all, according to a new look at observations of this immense collision of galaxies from the James Webb Space Telescope (JWST). “Our results indicate that the required amount of additional unseen mass – dark The post Does the Bullet Cluster contain a lot less dark matter than we thought? appeared first on Physics World.

Assessing the impact of radiation exposure is crucial for protecting the health of workers, but limited data, imperfect models and variations in methodology demands expert judgement to interpret the results The post Measuring the invisible: how internal dosimetry shapes radiation protection appeared first on Physics World.

Can you reconstruct this green energy image in our interactive slide puzzle? The post Physics and the green economy: a slide puzzle appeared first on Physics World.

Join the audience for a live webinar at 3 p.m. BST/10 a.m. EDT on 5 August 2026 For modellers and experimentalists: discover how SEI formation and graphite expansion define Li‑ion transport in electrodes The post Changes in structure and ionic resistance of lithium-ion battery graphite electrodes appeared first on Physics World.

New artificial vision system adapts faster to changing light conditions The post Machine vision begins to work like the human eye appeared first on Physics World.

A new method allows physicists to study fractional quantum Hall systems and anyon behaviour at unprecedented scale and accuracy The post Advanced simulations of exotic quantum matter appeared first on Physics World.

A novel electric-field-assisted spraying method demonstrates how nanoconfinement dictates whether glycine crystallizes into its stable α-phase or its highly functional, piezoelectric β-phase The post Controlling glycine polymorphs through nanoconfinement appeared first on Physics World.

Non-intrusive technique could enable round-the-clock, offsite monitoring of reactor operations The post Antineutrino detectors could spot signs that a fusion reactor is producing weapons-grade plutonium appeared first on Physics World.

Anita Chandran reviews Beyond Belief: How Evidence Shows What Really Works by Helen Pearson The post Evidence in action: how science helps us make better decisions appeared first on Physics World.

Combining artificial intelligence with physical climate modelling enables more accurate characterization of rare weather events The post AI-enhanced rare-event sampling helps predict extreme weather appeared first on Physics World.

Criticism comes from former presidential science adviser and NSF director Neal Lane The post National Science Foundation’s X-Labs initiative draws fire as ‘terrible idea’ appeared first on Physics World.