Scientists are testing a novel way to measure cosmic expansion using time delays in gravitationally lensed quasars. Their ...

For much of the twentieth century, scientists expected the expanding universe to slow over time. The opposite turned out to ...

Why does lead behave so differently from every other atomic nucleus when struck by electrons? A team of physicists at ...

Yuri Ralchenko led one of the oldest teams at the National Institute for Standards and Technology. The fate of some ...

New measurements using gravitational lensing suggest the universe’s current expansion rate does not agree with signals from ...

When two black holes merge or two neutron stars collide, gravitational waves can be generated. They spread at the speed of ...

OpenAI’s new FrontierScience benchmark shows AI advancing in physics, chemistry, and biology—and exposes the challenge of ...

OpenAI (OPENAI) has introduced a new benchmark, FrontierScience, which is used to measure expert-level scientific reasoning ...

Physics World is delighted to announce its Top 10 Breakthroughs of the Year for 2025, which includes research in astronomy, antimatter, atomic and molecular physics and more. The Top Ten is the ...

Scientists have taken a major step toward solving a long-standing mystery in particle physics, by finding no sign of the ...

Titas Chanda and Sthitadhi Roy receive the 2025 ICTP Prize for groundbreaking contributions to quantum many-body systems and ...

From a particle smasher encircling the moon to an “impossible” laser, five scientists reveal the experiments they would run ...