Cosmogenic nuclide dating of sahelanthropus tchadensis

) sloping face, very prominent brow ridges, and elongated skull.

Their humanlike features included small canine teeth, a short middle part of the face, and a spinal cord opening beneath the skull instead of towards the back, like in nonbipedal primates (or apes). Some of the oldest evidence for walking on two legs comes from Sahelanthropus.

There may have been less competition among Sahelanthropus tchadensis males, or perhaps males expressed aggression in other ways.

This skull, nearly complete though flattened by distortion, is also known by its nickname, ‘Toumai,’ which means ‘hope of life’ in the local Dazaga language of Chad.

Sahelanthropus tchadensis has two defining human anatomical traits; 1) small canine teeth, and 2) walking upright on two legs instead of on four legs.

Year of Discovery: 2001 The first (and, so far, only) fossils of Sahelanthropus are nine cranial specimens from northern Chad.

Their apelike features included a small brain (even slightly smaller than a chimpanzee’s!Because scientists have only recovered a single skull and some jaw and tooth fragments belonging to Sahelanthropus (no post-cranial fossils), we don’t know yet exactly how big an individual of this species would have been.Given the size of TM 266-01-060-1 skull, scientists estimate that Sahelanthropus individuals would probably be similar in size to a chimpanzee.In fact, Toumaï was probably reburied in the recent past.Taphonomic analysis reveals the likelihood of one, perhaps two, burial(s).

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This probably included leaves, fruit, seeds, roots, nuts, and insects.

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