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How large is the human sperm

You can all stop worrying about size, guys. Compared to our primate cousins, humans have the longest penis, a new video explains. Dangly Bits. According to Curnoe, an associate professor at the University of New South Wales in Sydney, Australia, variation in penis size boils down to the evolutionary pressures associated with reproduction. These pressures vary from species to species.
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The macho sperm myth

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Size matters when it comes to sperm dominance

NCBI Bookshelf. Molecular Biology of the Cell. New York: Garland Science; In most species, there are just two types of gamete , and they are radically different.
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Sperm: 15 crazy things you should know

An unsuccessful attempt to create such a hybrid was made by Ilya Ivanovich Ivanov in the s. The portmanteau word humanzee for a human—chimpanzee hybrid appears to have entered usage in the s. The possibility of hybrids between humans and other apes has been entertained since at least the medieval period; Saint Peter Damian 11th century claimed to have been told of the offspring of a human woman in Italy who had mated with an ape.
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It is the only living member of the genus Physeter and one of three extant species in the sperm whale family , along with the pygmy sperm whale and dwarf sperm whale of the genus Kogia. The sperm whale is a pelagic mammal with a worldwide range, and will migrate seasonally for feeding and breeding. The females cooperate to protect and nurse their young. Females give birth every four to 20 years, and care for the calves for more than a decade.

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