Episode Details

Astronomers have produced the most detailed 3D map ever of the early universe, revealing a vast hidden web of galaxies and gas that rewrites our understanding of cosmic structure. NASA's DART mission delivered a major win for planetary defense, with new analysis confirming the spacecraft's asteroid impact actually shifted an entire asteroid system's orbit around the Sun. Meanwhile, a 20-year nuclear mystery has finally been cracked, revealing the exact recipe the universe uses to forge gold and platinum in neutron star collisions. On Earth, new research suggests nearly half of all dementia cases may be tied to lifestyle factors you can actually change — and scientists are closing in on a pill that could deliver the brain benefits of exercise without the workout. Plus: hedgehogs can hear ultrasound, bacteria have figured out how to move without legs, and medieval society may have been far kinder to the sick than we ever gave it credit for.

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