The most precise measurement of cosmic expansion ever made still doesn’t add up

🌌🔢🚨 Astronomers just delivered the sharpest direct measurement ever made of how fast the nearby universe is expanding — and the answer refuses to agree with what the early universe predicts it should be. With better data than ever before and a community-built framework that eliminates the usual escape hatches, the Hubble tension is no longer something cosmologists can explain away. Something may be genuinely wrong with our best model of the cosmos, and this result makes that harder than ever to ignore.