Facial composite In the U.S. the FBI maintains that hand-drawing is its preferred method for constructing a facial composite. Many other police agencies, however, use software, since suitable artistic talent is often not available. Until quite recently, the facial composite systems used by international police forces were exclusively based on a construction methodology in which individual facial features (eyes, nose, mouth, eyebrows, etc.) are selected one at a time from a large database and then electronically 'overlaid' to make the composite image. Such systems are often referred to as feature-based since they essentially rely on the selection of individual features in isolation.
Human skeletal changes due to bipedalism result, in humans the muscles of the forehead (the occipitofrontalis) are only used for facial expressions. Increasing brain size has also been significant in human evolution. It began to increase around 2.4 million years ago but modern levels of brain size were not attained until after 500,000 years ago. Zoological analyses have shown that the size of human brains is significantly larger than what you would expect for our size. The human brain is in fact three to four times larger than its closest relative - the chimpanzee. Even with much modification, some features of the human skeleton remain poorly