Brain Aging Explained: How Your Hippocampus Rewrites Itself

Send us Fan Mail Your brain isn't fading. It's being renovated. A new Science study by Nathan Zemke and colleagues took a cell-by-cell look at the human hippocampus, and the story is stranger and more hopeful than "rust." 🧬 The 3D folding of our DNA slowly erodes, like a paper crane losing its creases. 🛡️ Between ages 50 and 75, the brain's original yolk-sac microglia appear to be replaced by blood-derived cells. ⭐ Synapse-managing astrocytes decline, and the switchboard thins. 🌅 And a readab...