Promising mouse studies and billions of dollars in funding are stoking excitement. But we’ve been here before.

Cellular reprogramming is the hottest topic in longevity science, with tech titans like Sam Altman investing in it. It's now being tested in humans.

Jonas Salk quietly built the polio vaccine through rigorous, methodical work in Pittsburgh: treating patients, refining data, conducting massive trials, before unveiling results that altered the ...