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Every time one of your cells divides, the protective caps on its chromosomes shorten a little, and once they get critically short the cell either falls asleep permanently or self-destructs — a built-in counter that also happens to be one of the body's strongest defences against cancer (opens the original)
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Every time one of your cells divides, the protective caps on its chromosomes — called telomeres — get a little shorter. They are stretches of repetitive DNA sitting at the ends of each chromosome, and their job is to stop the cellular machinery from mistaking a chromosome tip for a broken strand that needs urgent repair. The enzyme that copies DNA cannot quite reach the very end of a linear chromosome, so a small piece of the cap is lost each round. After enough rounds, the cap runs down to a cr
Scientists mapping the underground fungal networks that link tree roots estimate the threads stretch for 110 quadrillion kilometres worldwide, enough that laid end to end they would reach from Earth to the Sun nearly a billion times (opens the original)
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In a teaspoon of healthy soil, there can be up to 10 metres of living fungal thread. Scale that up across every grassland, forest and tundra on Earth and the total length of arbuscular mycorrhizal fungal hyphae in the top 15 centimetres of soil comes to roughly 110 quadrillion kilometres — a figure published in Science on 11 June 2026 by a team led by the Society for the Protection of Underground Networks.Laid end to end, that thread would reach the Sun nearly a billion times over. It would also
On 18 November 1929, an earthquake off Newfoundland broke six transatlantic telegraph cables almost simultaneously and six more in sequence over the next 13 hours and 17 minutes. When Columbia geologists reconstructed the pattern in 1952, the cables revealed an underwater sediment flow racing across (opens the original)
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At 20:32 UTC on 18 November 1929, a magnitude 7.2 earthquake struck beneath the Atlantic south of Newfoundland. Six transatlantic telegraph cables crossing the continental slope failed at effectively the same moment. Then the pattern changed. Six more cables, progressively farther downslope and out across the deep ocean, broke one after another during the next 13 hours and 17 minutes. The first failures could be explained by earthquake shaking and submarine slope collapse. The later sequence cou
In 1949, researchers testing underwater acoustics off Bermuda lowered an early recording system into the water and kept the unexplained sounds it picked up. Seventy-seven years later they were identified as what may be the oldest preserved recording of a whale singing, made before scientists underst (opens the original)
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A man’s voice reads a date onto a plastic disc. “The date, 7 March, 1949,” he says, as reported by Smithsonian Magazine. Underneath the announcement there is something else: a low, looping sound with a shape to it, rising and falling. It came up through the water off Bermuda into an experimental rig the researchers had lowered over the side. They did not know what it was. They kept it anyway. What they had captured, as noted by Woods Hole Oceanographic Institution, was the song of a humpback wha
Young fish are dropped from a small airplane over Utah's mountain lakes, poured out of one tank divided into seven chambers so the fish fall the last stretch through open air. More than 300 lakes inaccessible by vehicle are stocked this way each year, a practice Utah has used since 1956. (opens the original)
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You want to put fish into a high mountain lake, one with no road and no short trail to it. Fish need water to travel in, water is heavy, and no truck can get up there. So how do you do it? Utah’s answer, worked out over decades, is to skip the ground entirely. The fish arrive by air, and for the final stretch they arrive through open air, falling out of an airplane into the lake below. The plane doing this work is a small single-engine aircraft, and its cargo hold is the clever part. The Utah Di
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