50, 100 & 150 years ago.

• Localización: Scientific American, ISSN 0036-8733, Vol. 320, Nº. 3, 2019, págs. 75-75
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • The article discusses technological innovations and discoveries from 50, 100 and 150 years prior to 2019, which include concerns regarding thermal pollution caused by waste water from power plants in 1969, Carl E. Akeley's creation of the Akeley film camera in 1919, and the proposal to build the Panama Canal in 1869.