Homo dating

27-Jul-2019 01:24

Remains of individuals who died over 2 million years ago would be expected to have undergone a high degree of fossilization (i.e., mineralization).Now, one of three articles on reports that radiometric dating of the cave sediments within which the bones were found as well as of three teeth indicates that this species existed much more recently, up to at least between 236,000 and 335,000 years ago.Dating based on anatomical characteristics alone can only provide a very broad approximation of a specimen’s age, especially when considering a relatively poorly understood taxon (an evolutionary group of related species), such as hominins.Another discordant note was the condition of the bones, which were barely fossilized.

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Furthermore, it raises significant questions regarding the pattern of human evolution more generally.It exhibits a similar mix of primitive and advanced traits as were found in the first find, re-enforcing the interpretation that human evolution involved a mosaic of adaptations, rather than a uniform configuration at any given time.The degree to which human evolution involved actual speciation—separation into reproductively isolated groups due to genetic incompatibility—or was characterized by a continually evolving set of dispersed and genetically diverse populations which, nevertheless, maintained some degree of gene flow, and did not divide into separate species, remains an open, and very important question.This cranium is more complete than others from Olduvai.

Because some of the bones are crushed and distorted, however, the face and braincase are warped.

Initially, the researchers who discovered and analyzed the skeletal remains of at least 15 individuals of this previously unknown species, which were found deep in a cave located roughly 50 km (30 miles) northwest of Johannesburg, South Africa, thought that it was a very early member of the genus .