Dr. Marty Makary out as FDA Commissioner—was he the victim of a BigPharma purge? Are “liquid biopsies” useful? Persistent itch—could topical vitamin B12 provide an answer? You won’t believe this new medical use for Classic Coca-Cola; The solution for menopausal sleep problems goes beyond mere hormone replacement; Higher aerobic fitness boosts size of the brain’s memory centers—as does memorizing London taxi routes; And more!