Promiscuous Apes Make More Sperm

chimpanzee-suzi-eszterhas

Promiscuous ape species have bigger testicles

Chimpanzees produce 200 times more sperm than gorillas, the world’s largest primates, and 14 times more than orangutans, scientists based in Japan reveal.

Promiscuous ape species have bigger testicles, and the latest discovery finally provides evidence that they also produce more sperm.
Scientists previously proposed that chimps have large testicles because several males mate with a single female, and so have to produce more sperm in order to compete.

For their research, published in the American Journal of Primatology, scientists studied chimpanzees, orangutans and gorillas from zoos in Japan and Indonesia.

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New Evidence Humans Are Related To Orangutans

New Evidence Humans Are Related To Orangutans

Humans related to orangutans, not chimps 

New evidence underscores the theory of human origin that suggests humans most likely share a common ancestor with orangutans, according to research from the University of Pittsburgh and the Buffalo Museum of Science. Reporting in the June 18 edition of the Journal of Biogeography, the researchers reject as “problematic” the popular suggestion, based on DNA analysis, that humans are most closely related to chimpanzees, which they maintain is not supported by fossil evidence .

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