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| The phone users scored better. The bedtime users did not. |
| Your phone may not be the thief. A team at Fudan University in Shanghai pulled records on 10,846 adults aged 45 and up. Every one of them sat a standard thinking test. The phone users came out ahead of the non-users. Not by much — about half a point. But it ran the wrong way from what most of us expect. |
| Let me explain what they asked. Three plain questions, nothing clever. Do you use one? How many hours a day? And do you use it in bed before sleep? Then they laid those answers against the test scores. |
| The edge did not survive the night. Ten minutes of screen in bed, and the gain was gone. Those users landed level with people who own no phone at all. The daily total pulled the same way. The longer the hours ran, the thinner the benefit got. |
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A phone is two things at once. In daylight it asks you to read, recall, plan and reply. In bed it takes the one thing your brain cannot borrow back — the front of your night. |
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| I could be wrong about the cause. This is a snapshot, not a trial. Sharper people may simply reach for a phone more often. Nobody followed these adults across years to find out. |
| Still, the shape of it matters. The device is not the villain. The hour is. I urge you to leave the phone outside the bedroom tonight. |
| Yaqi Li and colleagues, Fudan University · 10,846 adults aged 45 and over · April 2026 |
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| Open the bedroom window before you turn in |
| Bedroom air goes stale while you sleep. You breathe out carbon dioxide for seven or eight hours. A shut door and a shut window hold it in the room with you. By dawn the level can sit well above what it is on the street. |
| Researchers in Eindhoven tried the plainest fix. Seventeen adults slept five nights with a window or door open, then five nights sealed. Open, the carbon dioxide held near 730 parts per million. Sealed, it climbed past 1,100. Sleep felt deeper on the open nights. |
| The fix costs nothing and takes two seconds. |
| The Protocol |
| When |
| Every night, as you head up to bed |
| Duration |
| Two weeks, then judge it |
| Rules |
| Open the window a hand’s width and leave it. On a loud street or a cold night, prop the bedroom door wide instead. Either way, keep the air moving till morning. Change nothing else — same room, same bedtime, same wake time. |
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| Watch how deep the sleep feels, not how long it runs. Be straight with yourself about the size of this. Seventeen young adults, five nights each way, and the depth was what they reported rather than what the monitors caught. I could be wrong about how far it carries. But air is free. I urge you to try it tonight. |
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| One protein, and the old mice learned again |
| One protein sits behind a lot of it. A control hub deep in the brain runs on menin. The level drops as an animal ages. Lige Leng’s team at Xiamen University put it back. The mice were already twenty months old. Inside a month they learned faster. Their bones and skin firmed up too. This is mice. The work is a few years old, and it came round again this week. |
| Xiamen University · PLOS Biology · 2023 |
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| Low mood may stall the making of new cells |
| Your memory hub keeps building cells. Maura Dupont’s team at Columbia University read nearly 500,000 of them, taken from donated brains. In the people who had lived with depression, the building had stalled. New cells help you tell one near-identical day from another. Without them the sorting gets harder. The team is careful here — the full chain is not known, and depression may be several illnesses under one name. |
| Columbia University · Nature Medicine · August 21 2026 |
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| One thread that listens, nudges and doses |
| The whole tool is thinner than a needle. Kunyang Sui and Christos Markos built it from soft plastic fibre. A light-carrying core runs down the middle. Eight tiny channels sit around that. In mice it listened to cells firing, flashed light to stir them, and fed in a drug. Three jobs, one thread, under half a millimetre across. Soft beats stiff going in, so less tissue tears. No clinic will see this for years. |
| Technical University of Denmark · Advanced Science · 2026 |
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| Your brain may be two organs, not one |
| We say the word as one thing. One skull, one organ, one story. Kyle Loh’s lab at Stanford Medicine went back to the very start to check it. They watched which early cells turn into which parts. |
| Two pools of cells, not one. The front and middle of the brain grow out of one pool. The stem at the base grows out of another. The two never trade places. Not once, in any embryo they looked at. Then they checked the family tree and found the same split in chickens, in zebrafish and in a burrowing sea worm. |
| So the two halves have separate ancestors. One deals in words, faces and plans. The other runs your breathing and your heartbeat and never asks. Evolution seems to have bolted two old nervous systems together and left them joined. We have been calling the result one organ ever since. |
| Stanford Medicine · Nature Neuroscience · September 18 2026 |
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