There are several hair samples found at BF sightings that have no DNA match. They can rule out other animals, but can't find any that match.
Who knows. Maybe some BF sightings are the work of some " mad scientists' that decided to cross humans with apes or chimps and release them in they wild. LOL!
All I know is, there are several hundred guys sitting in prison, right now, that have been convicted on just as much evidence as there is of BF. A blurry security camera photo, foot prints, an eyewitness, or multiple witnesses,etc...
Its been said, If Bigfoot were on trail, for what evidence they have, he'd be found guilty.
Too many people claim to have seen it. It would seem far more unlikely that of the thousands of reported sightings, everyone was hallucinating or misidentified a bear. People with high credentials have claimed to have seen it. Police officers, Sheriff's deputies, sunday school teachers, park rangers, etc... People that are trusted in their community.
Before the world knew of the Stealth Fighters the Air Force had, some of the proto types and actual planes were seen and observed on manuevers. They were reported as UFO's. People said they were crazy. Now all these years later, after the Gulf War, the Air Force comes clean. We find out that some of those reports were true.
I'm sure that doesn't explain all UFO reports but it shows how someone telling the truth is branded a liar and accused of making up stories.
I'm sure that everyone knows about the discovery of mountain gorillas. They weren't discovered until the early 1900's. How about the discovery of the giant panda? Read up on it, it may surprise you.
If you think about it, How much actual proof is there of God? Yet many believe, including me. I have a sister that is Atheist. I can't prove a thing to her. I'd have a better chance proving Bigfoot. As a matter of fact,she thinks there just may be something to the Bigfoot thing. Odd huh?