Evolution of nakedness in Homo sapiens

@article{Rantala2007EvolutionON,
  title={Evolution of nakedness in Homo sapiens},
  author={Markus J. Rantala},
  journal={Journal of Zoology},
  year={2007},
  volume={273},
  pages={1-7}
}
  • M. Rantala
  • Published 1 September 2007
  • Biology
  • Journal of Zoology
Homo sapiens L. is the only existing primate species lacking in functionally effective thermally insulating fur. As all other primates have considerable hair covering, it has always been accepted that our ancestors must once have had a respectable amount of body hair. Unfortunately, fossils cannot help us when it comes to differences in skin and hair. Recent DNA analysis, however, has given us some idea of when and where the great denudation took place. A number of hypotheses have been proposed… 

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References

SHOWING 1-10 OF 92 REFERENCES

Human nakedness: adaptation against ectoparasites?

  • M. Rantala
  • Psychology
    International journal for parasitology
  • 1999

A naked ape would have fewer parasites

  • M. PagelW. Bodmer
  • Biology
    Proceedings of the Royal Society of London. Series B: Biological Sciences
  • 2003
TLDR
The hypothesis that humans evolved hairlessness to reduce parasite loads, especially ectoparasites that may carry disease is proposed and explains features of human hairlessness—such as the marked sex difference in body hair, and its retention in the pubic regions—that are not explained by other theories.

The aquatic ape theory reconsidered.

Allometry of primate hair density and the evolution of human hairlessness.

TLDR
It is proposed that, lacking a reflective coat of hair, the exploitation of eccrine sweating emerged as the primary mechanism for adaptation to the increased heat leads of man's new environment and permitted further reduction of the remnant coat to its present vestigial condition.

Human Evolution

results of Y-chromosomal inheritance studies indicate that all living humans are related to a One misconception surrounding mitochondrial Eve is that since all women alive today descended in a direct

New partial skeleton of Homo habilis from Olduvai Gorge, Tanzania

TLDR
The craniodental anatomy indicates attribution to Homo habilis, but its postcranial anatomy, including small body size and relatively long arms, is strikingly similar to that of some early Australopithecus individuals.

The Descent of Man, and Selection in Relation to Sex

I.IF Mr. Darwin had closed his rich series of contributions to Science by the publication of the “Origin of Species,“he would have made an epoch in Natural History like that which Socrates made in

Sexual Selection

TLDR
I must confess that I am not convinced of the action of sexual selection in producing the colours of insects, but it cannot be denied that these facts are strikingly corroborative of Mr. Darwin's views.

The Scars of Evolution

When Elaine Morgan wrote The Descent of Woman in 1972, it sent shock waves around the world, and is now widely regarded as a key work on human evolution, and essential to any discussion of women's
...