We've heard enough stories to know what often comes before a Bigfoot sighting: extra-large prints in earth or snow, bits of hair, or a strong odor. But according to one expert, we reportedly might be walking right past a particularly telling sign that the creature is active in the area. Although they're not in agreement about the exact significance, said Thomas Marcum of Kentucky, many of those who study Bigfoot closely know that particular arrangements of downed trees and branches could mean one or more of the legendary beings are nearby. The founder of the Crypto Crew explained that limbs appearing to form an archway, an "X" shape, or a teepee-like structure are potential evidence that may go unnoticed by untrained eyes. In addition, it's possible that the shape of the formations and their meanings differ depending on where they're located, he noted.