"If these creature really exist and are as intelligent as some sightings have implied, then it is certainly possible that they could exhibit such behavior..." via Unexplained-Mysteries Image credit: Nisian Hughes via Getty Images The discovery of unexplained mounds in the woods of Kentucky has sparked suggestions of 'Bigfoot graves'. Despite the number of sightings that are reported each year, Bigfoot - the mysterious hairy hominid said to roam the forests of North America - remains as elusive as ever, prompting speculation that if these creatures do exist, they must be doing something to conceal evidence of their existence. Ultimately, only a body will ever satisfy science, and assuming that Bigfoot is a mortal creature, the obvious question remains - why have we never come across the body of one that has died ? Cryptozoologist and paranormal researcher Thomas Marcum thinks that he may have the answer. Earlier this month, he put forward the idea that mysterious mounds discovered in