Scientists make stunning discovery that could change our understanding of the Universe

New study reveals universe's fundamental constants are finely tuned to allow liquids to flow inside cells, offering a fresh clue to why life exists. | Contesto: cronaca

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• Scientists make stunning discovery that could change our understanding of the Universe

Contesto

Scientists may have uncovered a surprising secret behind why life exists at all. A new study suggests that the Universe’s fundamental constants — the deep physical rules that govern everything from atoms to stars — appear to sit within an incredibly narrow “sweet spot” that allows liquids to flow properly inside living cells. Even tiny shifts in these constants could make blood too thick, water too sticky, or cellular motion impossible, potentially wiping out life as we know it. The research, drawing on physics and biology, points to a delicate balance in the laws of nature that has long puzzled scientists. For decades, physicists have noted that fundamental constants, such as the strength of gravity or the mass of particles, seem set to values that permit the existence of stars, planets, and life. This new work adds a specific, biological dimension: the ability of cells to function depends on the flow of liquids at microscopic scales, a process that hinges on these same constants being precisely tuned. If any of these numbers were slightly different, the study suggests, the viscosity of water or the behavior of proteins within cells could change dramatically. Blood might become too thick to circulate, cellular transport could grind to a halt, and the chemical reactions essential for life would no longer occur. The finding reframes the so-called “fine-tuning problem” in physics not as an abstract cosmic coincidence, but as a concrete requirement for the machinery of life itself. The implications extend beyond biology into cosmology and philosophy. The fact that the universe appears to be calibrated for life has led some to invoke the anthropic principle — the idea that we observe these conditions because they are necessary for our existence. Others see it as evidence of a multiverse, where countless universes with different constants exist, and we happen to live in one that works. The new study does not resolve that debate, but it sharpens the question by showing just how narrow the window for life truly is. Critics caution that the study, while provocative, does not prove that the constants are deliberately set. It remains possible that future physics will...

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Categoria: cronaca