The brain quietly rebuilds itself, and dogs age a lot like us

They recreated those deep conditions in the lab, soaking magnetite samples in 200°C water under high pressure for 60 days, and found that injecting a solution into the surrounding banded iron formations sped the reaction up. The Pilbara holds some of the largest formations of this rock on Earth.

The molecules that turned out risky or protective in dogs closely mirrored ones already flagged in human longevity research. "The molecules that are risky for dogs or protective against a sooner death are very similar to those in people," said Dr. Kate Creevy, the project's chief veterinary officer, calling it evidence that dogs and humans "share important features of aging biology."

Instead of dividing whole cells at the injury site the way scar tissue usually forms, astrocytes sitting at the edge of a lesion sent newly made cell nuclei gliding down their long branching arms, deep into the damaged core, and rebuilt a working network from the inside out.

Delete TIMP2 from mouse microglia and the cells quickly start acting old: worse at clearing cellular debris, more inflamed, more prone to senescence. Inject TIMP2 into aged mice, though, and their microglia shift back toward a calmer state, clearing waste again instead of sitting in it.

The language network's activity in older adults was, in the researchers' words, nearly identical to younger adults', while the "multiple demand network" that handles executive tasks showed clearly weaker, less synchronized activity in those same older brains. "In the language network, we couldn't find any differences between older and younger groups," said lead author Anne Billot.

Watching a camera feed threaded up through the patient's nose, the AI tracked the surgeons' instruments in real time and flagged where hidden vessels and nerves were likely to be, essentially drawing the road signs that don't exist inside a real skull. "When I came round, I could see everything in the room clearly," Hibbert said. Before the operation he couldn't walk without glasses or a cane.

Choir members with brain injuries or dementia reported quality of life as high as community choir members with no communication disabilities at all. Singing draws on the same lungs and overlapping brain pathways as speech, so people who struggle to talk, including those with aphasia after a stroke, can often still sing a familiar old song fluently. Group singing also raised participants' oxytocin and endorphins while lowering cortisol, the body's main stress hormone.

"There's no words to express how I feel about it," she told him. That reaction became the seed of The Eternal Canvas Foundation, which Saetia, now 17, built by approaching mourners at his mother's cemetery and paying for supplies with money earned sharpening knives at a farmers market. It's now a registered nonprofit with roughly 400 active requests for free portraits of people's late loved ones.