Pigs and humans share more genetic similarities than previously believed
New genetic analysis reveals hidden evolutionary relationship between pigs and primates.
https://www.mnn.com/earth-matters/animals/stories/pigs-and-humans-more-closely-related-thought-according-genetic-analysis
Pigs share a number of surprising comparable traits with humans. For instance, we both have hairless skin, a thick layer of subcutaneous fat, light-colored eyes, protruding noses and heavy eyelashes. Pig skin tissues and heart valves can be used in medicine because of their compatibility with the human body. Medical students often practice suturing on pig's feet.
A chimp-pig hybrid origin for humans?
https://phys.org/news/2013-07-chimp-pig-hybrid-humans.html
he has amassed an impressive body of evidence suggesting that human origins can be best explained by hybridization between pigs and chimpanzees. Extraordinary theories require extraordinary evidence and McCarthy does not disappoint. Rather than relying on genetic sequence comparisons, he instead offers extensive anatomical comparisons, each of which may be individually assailable, but startling when taken together. Why weren't these conclusions arrived at much sooner? McCarthy suggests it is because of an over-dependence on genetic data among biologists. He argues that humans are probably the result of multiple generations of backcrossing to chimpanzees, which in nucleotide sequence data comparisons would effectively mask any contribution from pig.
The Hybrid Hypothesis
1: Human origins: Are we hybrids?
http://www.macroevolution.net/human-origins.html
For example, one widespread, but erroneous, belief is that all hybrids are sterile. This idea keeps a lot of people from even considering the possibility that humans might be of hybrid origin. The reality, however, is something quite different. For instance, in reviewing the reports I collected for my book on hybridization in birds (Handbook of Avian Hybrids of the World, Oxford University Press, 2006), which documents some 4,000 different kinds of hybrid crosses among birds, I found that those crosses producing partially fertile hybrids are about eight times as common as crosses known to produce sterile ones. The usual result is a reduction in fertility, not absolute sterility. My current work documenting hybridization among mammals shows that partially fertile natural hybrids are common, too, in Class Mammalia. And yet, it seems most people base their ideas of hybrids on the common mule (horse x ass), which is an exceptionally sterile hybrid, and not at all representative of hybrids as a whole.