The earliest known primitive hominin is __________.

Question

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Sahelanthropus tchadensis is the earliest known primitive hominin, dating back approximately 6-7 million years ago. The other options listed are also early hominins, but not as early as Sahelanthropus. Orrorin tugenensis is dated to around 6 million years ago, while Australopithecus afarensis is dated to around 3.85-2.95 million years ago. The Hobbit (hominin species Homo floresiensis) is dated to between 100,000 and 60,000 years ago, and Archaic hominins refers to a group of early hominins from about 4.4-1.4 million years ago.

The Earliest Known Primitive Hominin Is __________