By Team ClassWork 
12,000 years ago the earth’s temperature begin to increase which created a major change in Earth’s environment. This made to the development of grasslands in many places. Birds and animals began to multiply in uncontrolled manner.
Animals like the Sheep goats and other started live in the grasslands. Human who was hunting with animals began to observe the nature food habitats and the way these animals are multiplying later over a period of time he captured these animals and brought them up. Like this animal husbandry and dairying started.
In meantime time, human and also learnt to catch fish in springs and rivers & also noticed in the meantime that some grass bearing grains and grow naturally. He learnt to use them as food the grains and cereals like rice wheat barley and gradually learnt to grow them too.
Archaeologist referred this period by different names. The age which was 2 million years ago he is the oldest age and it is called as old stone age. Find it was stretched over a period of 12,000 years this long duration has been classified into three stages they are
- The early old stone age
- the middle old stone age
- and late old stone age.
The period from 12,000 years to around 10,000 years is called the middle stone in the tools of this period are generally very small and hence they are called delicate stone tools.
The new stone age begin after 10,000 years the stone tools of this particular period are different from the early ones these tools were bright and these tools were bright and these tools were bright and have sharp edges.
