Proceedings of the National Academy of Sciences · 27 July 2026 · From issue 12

Industrial chicken farming raised chicken-to-wild-bird germ jumps by about 100-fold since 1900.

Oakem J. Kyne, Bridget S. Penman et al., Accelerating Campylobacter zoonosis in the Anthropocene, Proceedings of the National Academy of Sciences.

Integrity screen: passed (3 checks) Checked 28 July 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 12 15 papers

In mice, an antibody treatment for tumors fails without a working internal immune sensor.
Nature Communications
Warming is releasing trapped mercury, making Antarctic waters a growing mercury hotspot.
Proceedings of the National Academy of Sciences
In spotted hyenas, inherited social rank made females more unequal in reproductive success than males.
Science Advances
A new blood test method found over 1,200 new gene-protein links in South Asian volunteers.
Nature Genetics
Mercury has its own belt of trapped, energetic electrons that can survive for days.
Nature Astronomy
In lab-grown cell sheets, stretching makes fiber networks clump and squeeze the nucleus out of its cage.
Nature Physics
Invasive species do more damage in poorer nations, not richer ones as long assumed.
Science
Muscle and exercise changes in long COVID and chronic fatigue patients do not match those caused by lying in bed for weeks.
Nature Communications
Ancient flooded river valleys left hidden salty groundwater under more than 10,000 square kilometers of coastal Louisiana.
Nature Communications
In monkeys, two separate brain systems adjust on their own to help flexible decisions, without depending on each other.
eLife
Most carbon from Canada's record 2023 wildfires rose from soil, not burning trees.
Geophysical Research Letters
In computer simulations, uneven water spacing pushed a wet proton between two known shapes.
Nature Chemistry
In lab tests, recycled plastic cracked sooner and failed faster than new plastic under stress and chemicals.
Science Advances
Free-living bacteria, not plant partners, were the first to fix nitrogen from the air.
Proceedings of the National Academy of Sciences

More from Proceedings of the National Academy of Sciences

In animals, fat bubbles carried genetic instructions across the brain's protective barrier into brain cells.
Issue 22 · 17 August 2026
In a computer model, glycerol crosses a human cell tunnel very slowly, taking microseconds to pass through.
Issue 22 · 17 August 2026
A common science claim of "no difference" often just means the test was not sensitive enough.
Issue 22 · 17 August 2026
Two closely related fish species use totally different decision styles, even with identical senses and goals.
Issue 20 · 13 August 2026
In lab experiments, one artificial genetic letter got copied much more easily than its designed partner.
Issue 20 · 13 August 2026