June 16, 2026
Soil has receipts
Subterranean fungi networks more than 100 quadrillion km in length
Earth’s hidden mushroom web is absurdly huge — and the comments instantly got feral
TLDR: Researchers mapped the underground fungus network that supports most plants and found it is vastly larger than anyone had measured before, while warning that modern farming is damaging it. Commenters were torn between amazement, map skepticism, and jokes that Earth might secretly be one giant living brain.
Scientists say the underground fungus threads that help feed plants and lock carbon into soil add up to a jaw-dropping 110 quadrillion kilometers worldwide — and online readers reacted like they’d just discovered the planet has secret Wi-Fi. The study, published in Science, used more than 16,000 soil samples to build the first global map of these buried networks. The big takeaway: this unseen life-support system is everywhere, especially in grasslands, and farming practices like heavy tilling can tear it apart.
But the real action was in the comment section, where people split into two camps: mind blown and hold on, that map looks weird. One commenter did the math and coolly translated the giant number into about 10.6 light years, comparing it to how the human body packs in a ridiculous amount of blood vessels. Another flat-out challenged the map, saying there was “no way” the American Southwest should show such intense fungus density in dry desert country. Meanwhile, Australia showed up with pure main-character energy, as one Sydney local casually flexed a backyard species list long enough to make everyone else’s lawn look embarrassing.
And then, naturally, the thread went full cosmic. One person wondered if all these fungal links make Earth itself sort of sentient, basically turning the story into sci-fi fan fiction. Others played the reality-check card, reminding everyone that when things are microscopic, tiny threads add up fast. So yes, the science is huge — but the comments turned it into a mix of awe, skepticism, backyard bragging, and “is the planet alive?” chaos.
Key Points
- •A study published in *Science* created the first global map of arbuscular mycorrhizal fungi using machine-learning models and data from more than 16,000 soil cores.
- •The researchers estimated that the underground fungal networks span about 110 quadrillion kilometres in total length.
- •Arbuscular mycorrhizal fungi form partnerships with more than 70% of plants and help plants access nutrients and water while contributing to soil carbon storage.
- •The study found that grasslands have the densest fungal networks, including areas such as the Everglades, the Sudd flooded grasslands, and prairie and steppe ecosystems.
- •On average, fungal network densities in cropland were 47.3% lower than in wild ecosystems, with tilling, fertilisers, and fungicides cited as important threats.