Human's tool modify

Early Hunting and Gathering Tools :-
An assortment of prehistoric tools provides evidence of the hunting and gathering methods of early peoples. Slabs of bark were often used to gather nuts and berries and functioned as crude dishes or bowls (top left). Reproductions of fishing tackle and arrows believed to have been used around 8000 bc are displayed on the lower left. Recovered tools for digging and cutting (right) are shown with recreated wooden handles. The heads of the adzes are made from flint, as is the fire-starter shown below them.

Early Agricultural Tools:-

Humans began farming about 12,000 years ago. The ability to control their food supply freed people from a nomadic lifestyle, which allowed for the beginning of cities and towns. These early farming tools date from about 6,000 bc. The picture portrays an axe (bottom) used for clearing; flint sickles (left), used for harvesting cereal crops; a flat rock and rounded stone (center), used for grinding flour; and perforated clay slabs (upper right), probably used to ventilate bread ovens.

Automation Trade-Off:-
Technological advancement has both positive and ill effects on a society. Take, for example, advances in automation technology. Automation has improved production efficiency and quality control, and has reduced the need to have workers perform potentially dangerous tasks. On the other hand, automation has made many jobs unnecessary, putting employees out of work, or forcing them to retrain.

Inventor with Robot:-
An inventor plays a duet with his robotic creation, Wabot-2, at the Tokyo Exposition. Building this kind of robot is a challenging task because the dexterity of the human hand is perhaps the most difficult function to recreate mechanically. Although Wabot-2’s performance may not be emotional, with an electronic scanning eye and quality components, the technical accuracy will be extremely high.

Nuclear-Powered Aircraft Carrier:-
Nuclear power propels the huge bulk of the Abraham Lincoln through the water. Part of the fleet of the U.S. Navy, the Abraham Lincoln provides a flight deck for high-performance planes. By naval standards the ship is very long, but its runway is still shorter than most air strips on land. To compensate for this, incoming planes use hooks on their undersides to catch arresting cables on the ship’s deck.

Robotics:-
This robotic hand is capable of performing the delicate task of picking up and holding an egg without breaking it. A tactile array sensor located on the right half of its gripping mechanism sends information to the robot's control computer about the pressure the robotic hand exerts; given this information, the control computer instructs the robotic hand to loosen, tighten, or maintain the current gripping force. This feedback loop repeats continuously, enabling the robotic hand to stay in between the two extremes of dropping and crushing the egg.