From the vast fungal network humming beneath every field to an alien world where dawn and dusk have completely different weather, this week’s science is full of hidden systems finally coming into view. Here are six discoveries worth sharing with your students — spanning ecology, space, materials, chemistry, animal behaviour and artificial intelligence.
1. The fungal “superhighway” beneath our feet
Scientists have published the first global map of the arbuscular mycorrhizal (AM) fungi that thread through the world’s soils, and the scale is staggering. Writing in the journal Science, an international team from the Society for the Protection of Underground Networks (SPUN), led by Dr Justin Stewart, estimate these living threads stretch around 110 quadrillion kilometres in total — so much that a single teaspoon of soil can hold up to ten metres of fungal filament. AM fungi partner with roughly 70% of all plant species, trading water and mineral nutrients for the sugars plants make by photosynthesis. They matter for the climate too: the networks shuttle an estimated four billion tonnes of carbon dioxide into the soil each year, equivalent to about 11% of humanity’s annual emissions. Worryingly, very few of the richest fungal hotspots sit inside protected areas — which is exactly why mapping them matters.
Think About It: Why might protecting underground fungi be just as important for tackling climate change as protecting the forests above them?
Image credit: SPUN / ScienceDaily — view source image
Originally reported by: ScienceDaily
2. An exoplanet with two completely different twilights
The James Webb Space Telescope has mapped the weather on WASP-121 b, a giant gas planet so hot it is tearing its own atmosphere apart — and found that its “morning” and “evening” skies are dramatically different. Because the planet keeps one face permanently toward its star, its dayside roasts at around 2,770 °C while the nightside sits near 1,000 °C. Powerful winds carry heat eastward around the planet, making the evening edge hotter than the morning edge, with more carbon monoxide and less water vapour. On the scorching dayside, temperatures are high enough to rip water molecules apart, while mineral clouds may drift across the cooler regions. Published in Nature Astronomy, it is one of the most detailed looks yet at how heat and chemistry vary across a single alien world — a reminder that “weather” on other planets can be unimaginably extreme.
Think About It: WASP-121 b always shows the same face to its star, just as the Moon always shows the same face to Earth. How would permanent daylight on one side change a planet’s weather?
Image credit: ScienceDaily — view source image
Originally reported by: ScienceDaily
3. A material that can be strong one second and fall apart the next
Engineers at the University of Colorado Boulder have created an unusual material that behaves a little like the liquid-metal robot from Terminator 2: it can lock together into a strong solid, then unravel into loose particles in seconds. The secret is shape. Using computer simulations and “pick-up” tests, the team found that tiny two-legged particles shaped like staples tangle together far more effectively than smooth grains such as sand. Gentle vibrations encourage the staples to interlock, making the material strong and tough at the same time — a rare combination — while stronger vibrations shake it loose again. Reported in the Journal of Applied Physics, the work points toward buildings and bridges that could be taken apart and recycled rather than demolished, and even swarms of small robots that entangle to do a job, then separate. Nature already uses the trick: think of a bird’s nest holding firm from nothing but interwoven twigs.
Think About It: Bird nests and bones get much of their strength from shape and structure, not just from what they are made of. Where else in nature does structure create strength?
Image credit: CU Boulder — view source image
Originally reported by: ScienceDaily
4. A smarter way to turn CO₂ into fuel
Turning waste carbon dioxide into methanol — a liquid fuel and key industrial chemical — has long been held back by an awkward trade-off. Low temperatures favour the reaction but make CO₂ hard to activate; high temperatures speed things up but trigger side reactions that waste the gas. Researchers at the Dalian Institute of Chemical Physics in China, led by Professor Jian Sun, have sidestepped the problem with a clever catalyst design. Instead of doing everything in one place, they spread the job across different sites: carbon dioxide is activated and hydrogenated on zirconium oxide, while copper efficiently splits the hydrogen. Separating the steps this way produced about three times more methanol than the standard commercial catalyst, while cutting unwanted carbon monoxide. Published in the journal Chem, the result is a promising step toward recycling CO₂ into useful fuels rather than releasing it into the atmosphere.
Think About It: Catalysts speed up reactions without being used up. Why is improving a catalyst’s selectivity — making more of the product you actually want — often more valuable than simply making the reaction faster?
Image credit: DICP — view source image
Originally reported by: ScienceDaily
5. Every honey bee has its own private flight path
Honey bees turn out to be far more individual than anyone expected. Using a drone fitted with a fast camera system and a tiny reflective marker on each bee, researchers at the University of Freiburg tracked individual foragers in 3D as they flew the 120 metres between their hive and a feeder. Each bee, it turned out, follows its own personal “commuter route” — and sticks to it with remarkable precision, trip after trip, in both directions. Some bees flew straight toward a particular tree before swerving around it; others aimed for a gap in a hedgerow. The bees were most consistent near obvious landmarks and wandered more over bare, featureless ground, suggesting they navigate using visual signposts. Published in Current Biology, it is the first study to capture such detailed 3D flight paths of bees in a real landscape, and helps explain how these tiny insects find their way so reliably.
Think About It: The bees relied on landmarks such as trees and hedges to stay on course. How might removing those features from farmland affect how well bees can navigate?
Image credit: ScienceDaily — view source image
Originally reported by: ScienceDaily
6. AI flunks a classic psychology test
Some of the most powerful AI language models have stumbled on a test that most schoolchildren can manage: the Stroop task. In this classic psychology experiment, colour words are printed in mismatched ink — the word “red” written in blue — and you have to name the ink colour while ignoring what the word says. Researchers led by Suketu Patel set the challenge to several leading AI systems and found that with short lists they scored over 90%, but as the lists grew longer their accuracy collapsed, sometimes to near zero. The models kept defaulting to simply reading the word rather than naming the colour. Humans, by contrast, stay accurate however long the list. Published in PNAS Nexus, the study suggests today’s AI lacks the “executive control” — the ability to hold a goal in mind and resist distraction — that human brains use effortlessly, exposing a real limit of current systems.
Think About It: Humans can hold a rule in mind and override an automatic response. Why might this kind of self-control be so difficult to build into an AI?
Image credit: ScienceDaily — view source image
Originally reported by: ScienceDaily
That’s our round-up for this week. Which of these stories would spark the best discussion in your classroom — and did any of them change how you see the world beneath your feet or the sky above? Let us know in the comments, and pass this on to a curious student or colleague.
Discover more from Practical Science
Subscribe to get the latest posts sent to your email.