although humans have ability to process food, does not mean weaker jaws. Human jaw was more powerful than the chimp or hominid who are accustomed to chew bark and seeds.

During this alleged human bite weakened because of the jaw and teeth were small relative to overall body posture. In addition, the ability to process food makes a man do not need to chew hard food.

But that still leaves the alleged puzzle, because in human tooth enamel is thick. Though it is generally found in thick layers on the creatures that have a strong enough bite.

The riddle was finally answered, when researchers in Australia managed to break the allegation. Human bite turned out 40 percent more effective than chimpanzees, gorillas, orangutans, and the two hominid species Australopithecus africanus and Paranthropus ie boisei is nicknamed the grain of human mastication (Nutcracker man).

"For its size, the most effective human jaw than their relatives. The size is influential, but the effectiveness is more important. And people are biting the most effective," said Stephen Wroe, a historian from the University of New South Wales, diutip from Live Science, Wednesday (23 / 6 / 2010).

In revealing this fact, researchers using three-dimensional model was made based on imaging Computerized Axial Tomography (CAT scan) to the skull size of several species of primates. These simulations provide detailed picture of the pressures arising from a bite.

The technique is often used to examine the strength of the jaw to the species of rare and hard to find. One of them, Wroe and colleagues have used it to study great white sharks that are now extinct.

These findings give hope to uncover further, how the process of evolution in the human diet and growth occurs. One was related to the relationship between increasing brain volume enlargement, jaw size decreases.