<Amsa prehistoric Museum>

 Today, I went to Amsa prehistoric museum. In there, I learned about how prehistoric people lived. We call this period before written record, prehistoric age. In 700,000years ago, the first human kind appeared. We seperate prehistoric age into 3 parts; stone age, bronze age, and iron age.

 We also seperated stone age with old stone age and new stone age. In old stone age, people hunted or gathered fruits with flacking stone. They lived in caves and moved to other places. Then, in new stone age, people knew about agriculture and grow crops with grinding stone. Grinding stone is sharper than flacking stone, so it's more useful. They began to build pit houses in the river side because they need  water to grow crops. Also, they began to make comb-patterned pottery to storage food. In bronze age, people used bronze and they made bronze weapons for wars. Some people became rich, but some people became poor, so they began to fight. Korea's frist country, Gojosun, appeared in this time.

 Iron is stronger than bronze, so people have used iron since B.C. 300. Even now, we still use iron. I think that iron is the most useful material.