I do not know why humans and pigs lost much of their hair, though I have several tentative theories which require more research. The popular idea on this forum right now is the "Aquatic Ape Theory."
However, I think I may have found a reason for their similar hearts. Have you ever wondered why pigs are the best animal for human heart transplates, instead of chimps?
It is a direct result of both species' partial hair loss.
Heartworms:
"Spread of the disease therefore coincides with mosquito season, which can last year-round in many parts of the United States. ... The mosquito usually bites the dog where the hair coat is thinnest. However, having long hair certainly does not prevent a dog from getting heartworms." https://vcahospitals.com/know-
I bet it helps, though.
Paleolithic animals had no treatment for such parasites. The only recourse for an animal losing its hair in a mosquito-infested environment may have been adaptation of the heart itself, through the process of natural selection.
If the parasite was not the heartworm itself, I posit the culprit was a parasite very much like it.
Humans have other immunities to heartworms, proving adaptation to them in the past. Though canine-specific heartworms cannot complete their life cycle in a modern human, adaptation implies a struggle with a primate-specific species of heartworm in an ancestral species of hominid.
https://www.wormsandgermsblog.
However, I think I may have found a reason for their similar hearts. Have you ever wondered why pigs are the best animal for human heart transplates, instead of chimps?
It is a direct result of both species' partial hair loss.
Heartworms:
"Spread of the disease therefore coincides with mosquito season, which can last year-round in many parts of the United States. ... The mosquito usually bites the dog where the hair coat is thinnest. However, having long hair certainly does not prevent a dog from getting heartworms." https://vcahospitals.com/know-
I bet it helps, though.
Paleolithic animals had no treatment for such parasites. The only recourse for an animal losing its hair in a mosquito-infested environment may have been adaptation of the heart itself, through the process of natural selection.
If the parasite was not the heartworm itself, I posit the culprit was a parasite very much like it.
Humans have other immunities to heartworms, proving adaptation to them in the past. Though canine-specific heartworms cannot complete their life cycle in a modern human, adaptation implies a struggle with a primate-specific species of heartworm in an ancestral species of hominid.
https://www.wormsandgermsblog.
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