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A partial tibia (the larger of the two lower leg bones) is strong evidence of bipedality, and a lower humerus (the upper arm bone) is extremely humanlike.
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Although the hominid fossil record is far from complete, and the evidence is often fragmentary, there is enough to give a good outline of the evolutionary history of humans.
The time of the split between humans and living apes used to be thought to have occurred 15 to 20 million years ago, or even up to 30 or 40 million years ago.
Their bones show that they were physically very strong.
Females were substantially smaller than males, a condition known as sexual dimorphism.
This species was named in July 2001 from fossils discovered in western Kenya (Senut et al. The fossils include fragmentary arm and thigh bones, lower jaws, and teeth and were discovered in deposits that are about 6 million years old.
The limb bones are about 1.5 times larger than those of Lucy, and suggest that it was about the size of a female chimpanzee.The word "hominid" in this website refers to members of the family of humans, Hominidae, which consists of all species on our side of the last common ancestor of humans and living apes.Hominids are included in the superfamily of all apes, the Hominoidea, the members of which are called hominoids.This species is known from a nearly complete cranium nicknamed Toumai, and a number of fragmentary lower jaws and teeth. tchadensis has many primitive apelike features, such as the small brainsize, along with others, such as the brow ridges and small canine teeth, which are characteristic of later hominids.The skull has a very small brain size of approximately 350 cc. This mixture, along with the fact that it comes from around the time when the hominids are thought to have diverged from chimpanzees, suggests it is close to the common ancestor of humans and chimpanzees.It is the intersection of the disciplines of paleontology (the study of ancient lifeforms) and anthropology (the study of humans).Tags: Adult Dating, affair dating, sex dating