Although humans reached the coast of southern Asia by around 60,000 years ago, the first arrivals to inland Asia made a separate journey from the Middle East. Humans arrived in southern Siberia by 43,000 years ago, as revealed by discoveries of ancient tools. These people later spread farther east and south, mingling with more recent arrivals. And some of their descendants made the first trip to the America more than 20,000 years later. Man's first tools were sticks and the stones which he learned to chip into rough axes. He used these axes as weapons, and they helped him wren he hunted animals. He also caught fish with spears, and fish-hooks made from thorns. Almost the only things that remain from this period, which is called the Old Stone Age, are some of the stone tools.
