Scientists have discovered a compound that restores the capacity to form new memories in aging rats, likely by improving the survival of newborn neurons in the brain's memory hub. The research has turned up clues to a neuroprotective mechanism that could lead to a treatment for Alzheimer's disease. The neuroprotective compound, called P7C3, holds promise because of its medication-friendly properties. It can be taken orally, has long-lasting effects, and is safely tolerated by mice.