tool
Tool (English): Equipment (equipment: equipment) (English: Equipment) is to facilitate people to complete the work of the apparatus, its benefits can be mechanical, it can be intelligent. Most of the tools are simple machines; for example, an iron bar can be used as a lever, the farther away from the fulcrum, the greater the force of the lever. The philosopher once thought that only humans would use the tools, so they were defined as animals that knew how to use the tools. But the observation found that chimpanzees and other animals, especially primates, and some birds (such as raven) and sea otters can use tools. After that, philosophers believe that only humans have the ability to make tools until the zoologist observes that some birds and monkeys will also make tools. Most anthropologists believe that the use of tools is an important step in the history of human evolution; human development and other fingers relative to the thumb to grasp the tools, and intellectual progress can help people appropriate use of tools. Some studies have shown that the brain sees the tool as part of the body's extension. Most of the tools can be used as weapons, such as hammers, knives; Similarly, people can also use explosives and other weapons as a tool. ...