EditorialPalestinian engineer Mohammad Abu Matar, 35, uses 3D printing to produce the medical and educational equipment, Gaza city, Gaza Strip, Palestinian Territory - 31 Aug 2022
EditorialA flexible thermoelectric device, which can harvest thermal energy from the environment and turn it into useful electrical energy, in Jeff Urban’s lab at the Molecular Foundry at Lawrence Berkeley National Laboratory, Berkeley, Calif., Nov. 26, 2019. (Anastasiia Sapon/The New York Times)