Beginning with the 700th millennium B.C. , man began to fashion his first tools from stone . Later , he cracked and crushed stones to make his first crude stone implements with
a cutting edge . Besides these primitive stone tools he also fashioned wooden tools such as sticks with sharpened tips , clubs , etc. From now on man consistently improved his tools to fit his purposes . He would sharpen both sides of a stone to make a chopper , a large universal...