Young human blood may help old mice learn better

The promise of young-blood injections to keep us sharp has captivated Silicon Valley, but the studies have all been with mice blood — until now. Researchers at Stanford University found that injecting mice with a protein found in human umbilical cord blood can improve their memory, though not everyone is as positive about the results.
Two years ago, the Stanford University lab of Tony Wyss-Coray, senior author of today’s study, showed that injecting young blood into old mice helped t