50, 100 & 150 years ago.

• Localización: Scientific American, ISSN 0036-8733, Vol. 297, Nº. 1, 2007, págs. 14-14
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • The article presents excerpts from previous articles about scientific issues. A quotation from physicists Murray Gell-Mann and E.P. Rosenbaum from 1957 discusses the classification of strange particles. A quotation from 1907 speculates on the possibility of vegetation on the planet Mars. A quotation from 1857 describes an air mask designed for firefighters.