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Across 309 studies of 343 rivers, the method explains reported microplastic levels better than geography does. Also here: heart and artery studies that cannot yet say which came first, and particles traced to car cabins, ventilators and snow.
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From the same tissue data, one analysis gets 159 milligrams of plastic in a body or 0.41, depending on how it treats the largest particles. Also: 49 labs counting one spiked beach sample, and where a swallowed dose went in hens.
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In mice, 100 nanometre beads peaked in the blood within an hour. Beads five and ten times larger took the lymph route and built up in the lymph nodes. Also: a cell test that scored the dose added, not the dose that arrived, and so understated the hazard.
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In Bangkok, people living with heavier traffic breathed more plastic, carried more of it in their urine, and showed more oxidative damage. Also: a cell viability test that misreads beads, and particles that only did harm in company.
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In sheep, dietary plastic damaged the testis without a particle ever reaching it, and a missing bacterial metabolite carried the injury instead. Also: a first look inside human ovarian follicular fluid, and a warning that some detections may not be real.
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Human placental tissue and two studies of the kidney converge on mitochondrial damage, work on insulin producing cells finds a separate immune route with a matching signal in people exposed at work, and a review names the gap none of it has closed.
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A pair of autopsy archives from one hospital gives the field its first real before and after, alongside new work on what crosses into a pregnancy and what that does not yet prove.
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Several of the strongest new studies describe a body that files microplastics away in the very cells meant to clear them, and the opening question of what that storage costs.
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The findings that stood out, and why the one that matters most is that our instruments have probably been undercounting the smallest particles all along.
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Micro and nanoplastics turning up in nearly every brain sample tested, new attention to the air we breathe, and the slow work of cleanup.
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A large group of papers about solutions: degradation, recycling, and bioplastics. And one heavily cited study finding that even the most ambitious commitments do not keep up.
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For years this was a marine science. The most cited papers in the founding corpus, and the 2020 study that made the human body something the field had to examine.
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