Sometimes if you see others vomiting, spontaneous people also feel nauseous and follow-up want to vomit. Does this indicate that vomiting was contagious?

Vomiting is a symptom of the condition of the body that do not fit. Many disease marked by symptoms of vomiting. Still vomiting is not contagious, the condition is called the Sympathetic vomiting. This occurs when the see, smell or hear the sounds of vomiting caused others to become sick and wanted to vomit.

This occurrence is common enough in the community and some scientists have thought that this is a sympathetic character who really has evolved in man.

Sympathetic vomiting may be seen as a simple reaction to a scene or an unpleasant smell of vomit.

Besides the odor generated when a person vomiting is widely regarded as the worst odor and can cause people nearby to feel nauseous.

As quoted from UIMC.discoveryhospital.com, Tuesday (22/06/2010) vomiting itself is not a contagious condition and is one of the conditions of the reaction in the body. But if the vomiting is caused by infection penyait, so that infection can be contagious.

While this may be just a reaction to a bad smell, it is possible the body has a subconscious reaction to the conditions surrounding it. Another factor is that there is a possibility someone has a sensitive stomach.

Some experts argue that the urge to vomit can be controlled by eating certain foods and beverages as well as trying to make the body breathe and relax through meditation.

If someone was sick, try to slowly consume carbonated beverages, stepped outside to get fresh air or divert the mind with other activities.

One thing is for sure do not jump to do the exercise or play sports, because some types of conditions requiring exertion can trigger nausea.

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.