| |
Difino
| • | is directly descended from ancient hand tools]]A tool is a device that provides a mechanical or mental advantage in accomplishing a simple machine, or a combination of them. For example, a crowbar simply functions as a lever. The further out from the pivot point, the more force is transmitted along the lever.
Philosophers once thought that only humans used tools, and often defined humans as tool-using animals. But observation has confirmed that monkeys and other animals, mostly primates, but also some birds (ravens, for instance), and sea otters can use tools as well.Later, philosophers thought that only humans have the ability to make tools, until zoologists observed birds[HTTP ] and monkeys[HTTP ][HTTP ][HTTP ]making tools.Most anthropologists believe that the use of tools was an important step in the evolution of mankind. Humans evolved an opposable thumb (useful to hold the tools) and an increase in intelligence (aiding in the use of tools).
Most tools can also serve as weapons, such as the hammer and the knife. Similarly, people can use weapons, such as explosives, as tools.
Source: [wikipedia: tool]
|
alebrije.info
:
alebrijes
:
sites
:
advertising
:
link to us
:
contact
|
|