The idea for cell phones has been round for lots longer than the know-how to provide them was. Duringthe Stone Age, ignition of fireside by rubbing stones, manufacture of varied handmade weapon and utensils from stones and clothing practice were a number of the simple technological developments of utmost importance. A fraction of Stone Age folks developed ocean-worthy outrigger canoe ship technology to migrate from one place to another throughout the Ocean, by which they developed their first informal training of information of the ocean currents, climate situations, sailing apply, astronavigation, and star maps. In the course of the later Stone Age interval (Neolithic interval),for agricultural practice, polished stone tools were made out of a variety of laborious rocks largely by digging underground tunnels, which will be thought-about as the first steps in mining expertise. The polished axes have been so efficient that even after appearance of bronze and iron; folks used it for clearing forest and the institution of crop farming.