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EverythingScience: post #6064 — TG.ME

EverythingScience@EverythingScience · 22K subscribers Open in TelegramOpen

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August 13, 2026 776 14

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Does the Nepal glacier collapse signal a new climate risk? Does the devastating flooding unleashed by the collapse of a section of a glacier in the Nepali Himalayas signal a new kind of risk in a world warmed by climate change? Here's what scientists told AFP. Repeat collapse risk On Friday, Nepal issued an alert about the risks posed by a large body of water formed in China's Tibet region following the collapse of a section of a glacier two days earlier. That collapse killed at least 584 people, and more than 2,400 remain missing. "Once you take a piece of mountain away, then there's probably another piece right beside it that's been destabilized by the removal. And so you could have a similar thing collapse," Simon Cox, principal scientist at New Zealand's GNS Science research institute, told AFP. "You may well have more material to fall down right from up at the source area, and the same thing could happen immediately again." According to the United States Geological Survey (USGS), the resulting flood was triggered by a glacier collapse so violent that it generated energy equivalent to a magnitude 5.2 earthquake and caused numerous landslides. Rising global hazard Etienne Berthier, a glaciologist at the French National Centre for Scientific Research (CNRS), told AFP, "we can't rule out" the risk of similar phenomena occurring elsewhere. "They reach such proportions in the Himalayas because the terrain and the region's high tectonic activity amplify the likelihood of such events occurring on that scale," he explained. Other regions may have similarly "dynamic" glaciers—such as Alaska—but "this happens in completely uninhabited areas." "We have seen a dramatic increase in the number of extremely hazardous flows such as this globally in the past decade or so," Source: Phys.org @EverythingScience 161·Aug 31 Self-blinking 'fairy lights' allow DNA to be imaged at almost double-helix-width resolution Researchers have developed fluorescent molecules that permit imaging of how DNA is packaged inside living cells at unprecedented resolution and, in preserved cells, at a resolution close to the width of the double helix itself. The team tested the fluorescent probes on slices of bowel tissue taken from three cancer patients. These are ordinary wax-preserved samples, which is how almost all hospitals store patient biopsies. In the tumors, the DNA was noticeably looser and more spread out than in the healthy tissue sitting right beside it. Other studies have found that DNA unpacks steadily as cancer takes hold, and the researchers suggest that how loosely a cell's DNA is folded could eventually serve as a measure of how far a tumor has progressed or how aggressive it is. Doctors currently examine these types of biopsies by eye, using a staining method more than a century old. The advance, described today in the journal Molecular Cell, raises the possibility that one day they could also look at how DNA occupies three-dimensional space inside cells as an additional clue for diagnosing and treating cancer. "With the same dye we can do two very different things. In a living cell we can watch DNA moving, which tells us how chromatin, the natural state of DNA in cells, behaves. In a preserved cell we can zoom in until we are almost at the scale of the DNA molecule itself. Combining both approaches helps us see one of the main layers of control in human biology in unprecedented resolution," explains ICREA Research Professor Pia Cosma, senior author of the study. Watching DNA in living cells Every cell in the human body holds 2 meters of DNA squeezed into a very small space. How tightly it is folded up decides which genes are switched on and which stay off. Almost all images of DNA folding come from cells that are already dead. Powerful microscope techniques needed to track individual components of DNA in cells typically require treating samples with harsh chemicals and strong laser lights that living cells cannot survive. A team at the Centre for Genomic Regulation (CRG) in Barcelona, the City University of Hong Kong and the Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences) Southern Medical University found a way to overcome this challenge by designing fluorescent probes. Called HoTs, the dyes can navigate inside living cells on their own and stick to DNA. The probes are designed to blink intermittently, meaning they flicker on and off like fairy lights. The researchers tested them in living human skin cells and in living HeLa cancer cells grown in the laboratory. If every dye lit up at once, microscopes would take a blurry picture. By blinking one at a time, an advanced microscope works out exactly where each probe is. After taking thousands of snapshots, a computer program builds up a picture 10 times sharper than conventional microscopes. Source: Phys.org @EverythingScience 246·Aug 31 Roman Rises! Five Things to Know About NASA's New Space Telescope NASA's newest eye on the sky, the Nancy Grace Roman Space Telescope, has begun its journey to unravel the secrets of dark matter, dark energy and Earthlike planets — months ahead of schedule. The 9-ton telescope rode to space today aboard a SpaceX Falcon Heavy rocket that was launched from NASA's Kennedy Space Center in Florida at 7:26 a.m. ET (11:26 UTC). The ascent went off without a hitch, setting up the telescope for a three-month cruise to a gravitational balance point known as Earth-sun L2, a million miles beyond our planet. The Falcon Heavy's two side boosters flew themselves back to landings on the Florida coast, near the launch site, while the center core booster splashed into the sea after stage separation. NASA had originally scheduled liftoff for 2027, but the $4.3 billion mission came in ahead of schedule and under budget. Here are five key facts about the Roman Space Telescope and its mission... Source: Universe Today @EverythingScience 289·Aug 31 🌐 Get more details at the Roman Postlaunch News Conference starting at 13:30 UTC @EverythingScience 356·Aug 30

Adopt a Pixel Claim your pixel on one the first images from NASA's Nancy Grace Roman Space Telescope! When Roman captures its first images (early 2027), each pixel will represent a piece of the cosmos never seen before at this resolution. Claim your pixel and be part of this historic moment! You will receive a certificate like the one above with your pixel number. » Adopt your pixel! @EverythingScience 447·Aug 30

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