Analyse the evolution of man as a tool making animal.
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Using tools has been interpreted as a sign of intelligence, and it has been theorized that tool use may have stimulated certain aspects of human evolution-most notably the continued expansion of the human brain.
Paleontology has yet to explain the expansion of this organ over millions of years despite being extremely demanding in terms of energy consumption.
The brain of a modern human consumes about 20 Watts (400 kilocalories per day), which is one fifth of the energy consumption of a human body.
Increased tool use would allow for hunting and consuming meat, which is more energy-rich than plants.
Researchers have suggested that early hominids were thus under evolutionary pressure to increase their capacity to create and use tools.
Precisely when early humans started to use tools is difficult to determine, because the more primitive these tools are (for example, sharp-edged stones) the more difficult it is to decide whether they are natural objects or human artifacts.
There is some evidence that the australopithecines (4 mya) may have used broken bones as tools, but this is debated.
It should be noted that many species make and use tools, but it is the human species that dominates the areas of making and using more complex tools.
Paleontology has yet to explain the expansion of this organ over millions of years despite being extremely demanding in terms of energy consumption.
The brain of a modern human consumes about 20 Watts (400 kilocalories per day), which is one fifth of the energy consumption of a human body.
Increased tool use would allow for hunting and consuming meat, which is more energy-rich than plants.
Researchers have suggested that early hominids were thus under evolutionary pressure to increase their capacity to create and use tools.
Precisely when early humans started to use tools is difficult to determine, because the more primitive these tools are (for example, sharp-edged stones) the more difficult it is to decide whether they are natural objects or human artifacts.
There is some evidence that the australopithecines (4 mya) may have used broken bones as tools, but this is debated.
It should be noted that many species make and use tools, but it is the human species that dominates the areas of making and using more complex tools.
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