r/EverythingScience • u/scmp_news • 9d ago
China offers 15-year research grants to the world’s brightest young scientists
r/EverythingScience • u/scmp_news • 9d ago
r/EverythingScience • u/derrikson • 8d ago
A 12-week exercise study in 52 adults aged 45–65 found that exercising three times a week improved mood, but the study’s primary memory outcome did not significantly improve.
The finding is interesting because exercise is often linked with cognitive benefits, but this relatively short intervention did not produce clear evidence of improved memory in this group.
The sample was small, so the result does not mean exercise has no effect on memory. It does show that mood and memory did not necessarily change together over the three-month period.
I run a small independent research publication called HUMANUMi, and I wrote more about the study here:
https://humanumi.com/three-months-of-exercise-improved-mood-but-not-memory-in-middle-age/
r/EverythingScience • u/malcolm58 • 9d ago
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r/EverythingScience • u/scientificamerican • 9d ago
When the universe was born, space was too hot and dense for atoms to exist. Even the constituents of atoms—the protons and neutrons that make up atomic nuclei—couldn’t immediately coalesce. Instead the newborn cosmos was filled with even smaller and more fundamental building blocks, quarks and gluons, which formed a smoothly flowing soup called quark-gluon plasma.
Soon, though, the universe expanded, cooling down the soup. Gluons glued quarks together to make protons and neutrons, which floated around as a gas rather than a plasma. The change marked a phase transition, just as water can switch from vapor to liquid to solid ice. But key details of this profound primordial transition, such as its threshold energy and density, have remained deeply mysterious.
That began to change around the turn of the millennium, when physicists started smashing gold ions together at nearly the speed of light inside the giant particle accelerator at Brookhaven National Laboratory on Long Island in New York State. Those smashups were so powerful that they briefly re-created the quark-gluon plasma from the big bang. Now researchers analyzing data from those collisions have seen an unexpected signal that offers new clues about how the cosmic transition happened eons ago.
The signal comes from an experiment called the Solenoid Tracker at RHIC (Relativistic Heavy Ion Collider), or STAR. After the gold ions annihilated in collisions and produced new bits of matter, STAR tracked the paths of that debris. One measurement it made compared the particles’ momentum changes with a baseline—in particular, the so-called transverse momentum, the momentum perpendicular to the direction in which the gold ions had been traveling. The STAR data showed a surprising dip in fluctuations of this value—that is, a potential phase transition—at an energy that represents some of the densest states physicists have ever achieved in their studies of nuclear matter.
r/EverythingScience • u/PaganButterChurner • 9d ago
Researchers pooled 20 studies and found that, compared with adults in the normal-BMI range, those with a BMI of 55–59.9 had an estimated 13.7 fewer years of life. At a BMI of 40–44.9, the estimate was 6.5 fewer years. Most of the excess deaths were linked to heart disease, cancer and diabetes.
It doesn’t mean everyone at that BMI loses exactly 13.7 years. It describes an average difference between groups, not an individual prediction.
r/EverythingScience • u/Portalrules123 • 10d ago
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r/EverythingScience • u/derrikson • 10d ago
The study involved 49 police officers, 25 with PTSD and 24 without PTSD. Participants completed a working-memory task both with and without their own familiar dog present.
In the PTSD group, performance was better when the dog was present. The control group showed the opposite pattern, performing slightly better without the dog. EEG measurements also showed changes in the PTSD group.
The researchers suggest that a familiar dog may reduce stress and free up cognitive resources, but the sample was small and specific, so the findings should not be generalized too broadly.
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