Physical Review X · 22 October 2026 · From issue 56

Cosmological and High-Energy Physics Implications from Gravitational-Wave Background Searches in LIGO-Virgo-KAGRA’s O1-O4a Runs

No ancient cosmic ripple signal was found, but the search still ruled out many early universe theories.

A. G. Abac, I. Abouelfettouh et al.

Integrity screen: passed (3 checks) Checked 30 October 2026. Read the source

The plain-language reading of this paper is in the full issue, for subscribers.

Read the full issue

Get it free, every two days

Five papers free every issue, about 15 emails a month. No spam. Leave in one click.

Also in issue 56 15 papers

In 30 cancer patients, a blood treatment calmed severe immune reactions caused by cancer drugs.
Nature Communications
Strict hormone testing rules meant to help women's health research can block some studies instead.
eLife
In lab tests, dense ice absorbed meaningful amounts of two simple amino acids.
Science Advances
Crows make visual choices in 235 milliseconds, twice as fast as primates, with equal accuracy.
Science
A fast computer program can read gas clouds in quasar light almost as well as slow older methods, in simulations.
Monthly Notices of the Royal Astronomical Society
In fruit flies, infection outcomes depend on gene pairings, not on either host or virus genes alone.
PLOS Biology
In mice, one brain region learns both sound and sight cues equally, but skill transfer only goes one way.
Nature Communications
In Arctic seafloor mud, ocean-made carbon held far more pollution than land-made carbon.
Nature Communications
A flexible fiber sensor measured blood sodium and potassium in real time inside rabbits.
Science Advances
Crocodile relatives kept the same warm climate preference for 245 million years instead of adapting.
Science Advances
Picking the higher paying team option is easy by age 10, but picking the safer option improves with age.
PNAS Nexus
In the lab, zirconium molecules held quantum information for up to 87 milliseconds.
Nature Chemistry
A math model shows one repeated growth rule can produce nearly all mollusk shell shapes.
Proceedings of the National Academy of Sciences
Watching nature videos, human brains track actions more than who is in them or where.
Proceedings of the National Academy of Sciences