Author: patrick scheidegger

Tenochtitlan on Lake Texcoco Modern Mexico City: a super metropolis of nine million people, was once a series of lakes. The Aztec capital, Tenochtitlan, was located there on a network of artificial islands. In those lakes, in countless numbers, swam the axolotl, Ambystoma mexicanum, a wholly aquatic salamander. According to≫ more

The Swiss Screw Thread In 1876 the Société des Arts de Genève formed a committee to standardize small screw threads for instruments, clocks and watches, Geneva being a center of the watch industry. The committee consisted principally of persons actually active in horological manufacturing. They began by forming an extensive≫ more