Clockwise from top left: ‘Hammer and Silicon’ authors Daniel Satinsky, Sheila Puffer, and Daniel McCarthy (Courtesy Sheila Puffer); scientist Slava Epstein (Adam Glanzman/ Northeastern University); Vladimir Torchilin, director of pharmaceutical biotechnology and nanomedicine at Northeastern University; anti-aging researcher at Harvard, Vadim Gladyshev (YouTube screenshot).

From cancer research to designing systems powering the Eiffel Tower, the unsung scientists, inventors and entrepreneurs found in the new book ‘Hammer and Silicon’ make an impact.