Resumen de 50, 100 & 150 years ago.
This article presents reprints from the magazine from years past. In December 1957, the talk was of Sputnik 2 which carried the first living creature into space and of the difficulties of keeping penguins healthy in captivity. In December 1907, the article discusses the increasing number of mine disasters in the U.S. The December 1857 issue is represented by an article on the discovery of Mount Everest and the exploration of Niger in Africa and how quinine prevented malaria among the explorers.
