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Astronomy Jul 21, 2026

Does dark energy really exist? Our work identifies cracks in the foundations of today's cosmological model

According to current understanding, the universe is expanding—and is doing so at an accelerating rate. This is believed to be caused by something called the cosmological constant, which was first proposed by Albert Einstein ...

Astronomy Jul 14, 2026

Frame-dragging observations validate Einstein yet again

More than a century after Albert Einstein first transformed our understanding of gravity, his general theory of relativity continues to withstand ever more demanding experimental tests. Now, an international team led by Ignazio ...

Other Jul 11, 2026

Saturday Citations: Blue zone longevity; soft tissue find predates dinosaurs; black hole collisions simplified

This week, researchers reported finding nanoplastics in Antarctic soils for the first time, suggesting they were delivered via long-range atmospheric transport. A study associates the use of hormonal birth control with the ...

General Physics Jun 25, 2026

A thermodynamic approach to gravity could explain cosmic acceleration without dark energy

Gravity, the force that attracts objects toward each other, is currently framed by Albert Einstein's theory of general relativity. This framework describes gravity as the curvature of spacetime, the invisible four-dimensional ...

Evolution Jun 22, 2026

How thousands of nature's longest sperm squeeze into a tiny fruit fly

When Jasmin Imran Alsous peered down her microscope lens, she expected to see chaos—a mishmash of tangled cells. She was viewing the inside of a male fruit fly's sperm storage organ, using a powerful microscope at the CCBScope ...

General Physics Jun 20, 2026

Quantum gravity research links continuous parameters to local operators within the theory itself

A researcher at Kyushu University and his collaborators have shown that continuous parameters in quantum gravity may not be freely adjustable "dials" from outside the theory, but rather arise from operators within the theory ...

Astronomy Jun 19, 2026

Bullet Cluster observations reopen dark matter debate with MOND-compatible explanation

The Bullet Cluster has so far been considered evidence of the existence of dark matter. An international team of researchers has now analyzed new data and current images from the James Webb Space Telescope (JWST). According ...

Space Exploration Jun 12, 2026

Aliens might exist, but there are three reasons why they're not visiting us

The United States government's recent release of hundreds of previously classified unidentified anomalous phenomena (UAPs) cases spanning the 1940s to the present, along with the new Steven Spielberg movie, "Disclosure Day," ...

General Physics Jun 11, 2026

Collapsing stars could spawn mini-universes, offering new path to gravastars

Stars shine because atoms fuse in their interiors, releasing energy. When a very massive star has exhausted its nuclear fuel, radiation pressure can no longer provide sufficient counterforce to gravity. The star then collapses ...

General Physics Jun 8, 2026

Tabletop experiment helps reconcile fundamental physics

Assistant Professor Haocun Yu is something of a scientific diplomat. In a recent Physical Review Letters publication, she and her colleagues show how a tabletop experiment can bring together two bedrock physics theories that ...

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