Dermal ridges found on Bigfoot footprint casts by forensic expert:
https://www.tsemrinpoche.com/tsem-tulku-rinpoche/science-mysteries/dermal-ridges.html
"Jimmy Chilcutt, a crime scene investigator, is one of the foremost experts in Dermal Ridges and in the documentary,
Sasquatch: Legend Meets Science, he examines the best samples of Bigfoot footprint castings. In his work, Chilcutt says he has to be very careful and professional because his work can put people in jail. Chilcutt has fingerprinted every known great ape species and hence, he is also an expert in primate dermal ridges. Through his research, he is able to establish gender and race of primates via examination of dermal ridges.
According to his research, human dermal ridges run horizontally across the feet, while in primates, the ridges run diagonally. But in the Bigfoot castings, the dermal ridges run vertically across the side of the feet. This goes to show that the Bigfoot footprint casting was clearly not made by a man or an ape. On top of that, the Bigfoot footprint cast is twice the thickness of footprints made by a human. This means that the creature making the print is much heavier than a human being and is around the size of the creature that we commonly know as Bigfoot. In the video, Chilcutt notes that a particular Bigfoot footprint cast he was examining had the same dermal ridge patterns as another footprint cast taken 10 years apart and that the samples taken are hundreds of miles apart. This is clear evidence that there is obviously more than just one Bigfoot, and that they are in fact a species like humans, spread over a large area. On top of that, they can be individually identified by their dermal ridges, just as humans can be individually identified by their fingerprints.
Dermal ridges can only be seen under magnification, and not with the naked eye. If the castings were hoaxes, it would take a very high level of sophistication to produce, either a scientist or a crime scene investigator, both of whom would have had to be specialised in dermal ridges. A hoaxer would need to painstakingly carve out each line of the dermal ridges, which run parallel to each other and do not intersect, onto a mould. This in itself would be a feat, given the precision and intricacy of the lines. This mould would then have had to be used to create an impression in the mud or soil in various places, for other people to come and make castings of. What makes the situation even more unlikely is that each mould would have to be different, but include the intricate dermal ridges. Who would have the specialisation to do something like that, and what benefit would they get from doing so? It doesn’t make sense that it would be a hoax, given the intricacy and the lack of benefit that such work would entail.
Dermal ridges have been found on Bigfoot castings from all over the world, and when they are examined together, they all have the exact type of vertical characteristics. For someone to have hoaxed the footprints is highly unlikely due to the geographical difference and the length of time between when the footprints were found and the castings made. Another fact is that dermal ridges are only known occur in humans and primates, however it is scientifically clear that the Bigfoot castings do not belong to either of these two bi-pedal creatures, especially since the dermal ridges are completely different. Despite the fact that the footprint castings vary between location and time, which they would in any species, the fact that dermal ridges are clearly evident on them under magnification, and that they are different, just goes to show that Bigfoot is not just one creature, or something that was imagined, but an actual unknown species, just like humans and primates. In essence dermal ridges is solid proof that the Bigfoot species exists...."