The Homo Habilis or the ‘skilful’ humans developed about 2.5 million years ago. They produced stone tools, lived in small groups, and moved from one place to another like nomads, when food became scarce. After mastering the fire, humans wandered to the cooler Europe and Asia. Humans learnt to cultivate the land and keep the cattle and pets. The Stone Age ended when humans learnt to obtain metals from the ores.