Common Design Features: All spring aligners are available for both arches. Standard design is 3-3, although 4-4 is very common & often used when canine correction is desired. Wraparound designs are also available with Mushroom & Super Spring designs.
exists and is an alternate of . The most generally accepted scientific theory states that the first humans (defined as members of the genus Homo) originated in Africa. The oldest known fossil of a human ancestor (a female Ardipithecus ramidus specimen nicknamed Ardi, 3.2 million years old) at a site called Aramis in the Middle Awash region of the Afar Desert in Ethiopia.
(redirected from Human origin) theory of the origins of the human species, Homo sapiens. Modern understanding of human origins is derived largely from the findings of paleontologypaleontology. [Gr.,= study of early beings], science of the life of past geologic periods based on fossil remains.