ScienceDaily |
Popis: Breaking science news and articles on global warming, extrasolar planets, stem cells, bird flu, autism, nanotechnology, dinosaurs, evolution...
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Life uses 4 DNA letters. Scientists just made 8 work7:39 Researchers at UC San Diego have demonstrated that a key cellular enzyme can accurately read an eight-letter genetic alphabet, doubling the four letters used by all known life on Earth. Detailed imaging revealed that RNA polymerase handles synthetic DNA letters in surprisingly similar ways to natural ones. The finding brings scientists closer to building expanded genetic systems that could perfor… Quantum oscillations defy expectations in this exotic material7:39 Scientists have uncovered an unusual form of electron behavior in zirconium pentatelluride, a quantum material that can act as both an insulator and a conductor. Under temperatures near absolute zero and magnetic fields reaching 60 tesla, electrons produced quantum oscillations that continued even after conventional physics predicted they should disappear. Scientists overturn a theory about this shark’s strange head0:48 Scientists have overturned a leading explanation for why male and female bonnethead sharks have differently shaped heads. Instead of males developing a pointed snout at maturity, both sexes actually begin with more pointed heads that become rounder with age, particularly in females. Harvard scientists turn knitting into shape-shifting smart fabric0:48 Harvard researchers have transformed ordinary knitting into a platform for creating fabrics that can snap between different shapes and perform useful functions. Using elastic yarns and industrial knitting techniques, the team engineered thick textiles that naturally curve and lock into multiple stable configurations, much like a light switch flipping between on and off. By adding conductive yarn,… A longer exhale may push your brain toward bolder decisions14:40 Slow breathing with a prolonged exhale made people more willing to take risks by changing heart activity and increasing the brain’s sensitivity to rewards. The findings suggest that something as simple as controlling your breath can directly influence how you evaluate choices. Giant Greenland iceberg slams into Joe Island and survives14:40 A giant iceberg measuring more than 76 square kilometers broke from Greenland’s Petermann Glacier in August 2026, marking the Arctic’s largest glacier calving event since 2020. The berg later slammed into Joe Island but survived without breaking apart, and satellites are now tracking it as it drifts through Nares Strait. Dark matter detector finds a strange signal scientists can’t yet explain14:40 The LUX-ZEPLIN experiment has detected a rare particle interaction that looks unusually difficult to explain as ordinary background noise and appeared where dark matter might be expected. Scientists are not claiming a discovery yet, but additional data could show whether this single mysterious event is the first hint of a long-sought dark matter particle. Scientists reveal the hidden instructions that build the human brain14:40 UCLA researchers have discovered two powerful influences that help guide how the human brain forms before birth. Radial glia, stem cells responsible for producing much of the cerebral cortex, change their behavior depending on how they process glucose and on physical contact with signals arriving from the thalamus. Those signals can alter which types of neurons are produced, including upper-layer… Scientists discover a bizarre “devil flower” hidden in Thailand14:40 Scientists have discovered a strange black “devil flower” in Thailand that lives mostly underground, steals nutrients from fungi, and looks strikingly unlike a typical plant. The newly named Thismia daemona is known from fewer than 50 individuals and may already be critically endangered. Stanford scientists discover a seafood that can reverse signs of aging14:40 A substance found in edible sea squirts appeared to reverse several signs of aging in older mice. Plasmalogen supplements improved memory and learning, strengthened connections between brain cells, reduced inflammation, and even helped the mice grow thicker, darker hair. Researchers believe the compounds may encourage brain regeneration and protect aging synapses. New injectable treatment helps the brain rebuild after stroke14:40 Duke researchers developed an injectable scaffold that helped stroke-damaged brains grow new blood vessels, support nerve regrowth, and recover movement in mice. The treatment appears to work partly by recruiting the body’s own immune cells, including neutrophils that may switch from damaging to helpful under the right conditions. Extreme drought now covers 44% of Puerto Rico14:40 Puerto Rico’s normally rainy season has instead brought a severe and fast-growing drought. By August 25, three-quarters of the territory was in at least moderate drought, with extreme drought covering 44 percent and some areas receiving less than 20 percent of their usual rainfall. Water shortages have forced rationing, while farmers are losing crops and ranchers are running low on hay. The situa… Deep beneath Mars, scientists find a vast hidden magma system14:40 Deep beneath Mars, scientists have found evidence of enormous magmatic systems once thought to require Earth-like plate tectonics. Seismic measurements suggest molten rock repeatedly evolved and recycled itself through the Martian crust, potentially across hundreds or thousands of kilometers. The discovery challenges long-held ideas about how complex planetary crusts form. MIT turns bacteria into living transistors14:40 MIT researchers have created bacterial “transistors” that can be wired together into living circuits capable of performing calculations and directing chemical signals. One day, these biological computers could coat plant roots or leaves, detecting environmental threats and automatically triggering defenses. Plants may be evolving the wrong traits for a warming world14:40 Morning glories may be getting caught in an evolutionary tug-of-war between surviving climate change and attracting increasingly scarce pollinators. Over just nine years, researchers found that the plants’ rate of adaptation plunged by 96%, even though they still had plenty of genetic diversity to evolve. |