Albert Einstein was sailing on Little Peconic Bay, NY in July 1939 when colleagues told him that bombarding the nucleus of the uranium atom could produce a chain reaction and release enormous energy -- in accordance with his formula, E=mc2.  His response?  “Daran habe ich gar nicht gedacht.”  “I’ve never thought of that.” Is a stem cell-based artificial immune system possible?   What would it mean to capture the power that took evolution  a hundred thousand years to create?