Startups Flock to Turn Young Blood Into an Elixir of Youth
In the early 2000s, a handful of young scientists at Stanford turned the university\u2019s Palo Alto campus into the mouse-stitching-together capital of the world. Reviving a centuries-old procedure known as parabiosis, they connected the circulatory systems of dozens of pairs of rodents, young sutured to old, so that they\u2019d pump one another\u2019s blood back and forth.