It was just about 4 a.m. when an otherworldly scream cut through the forests lining the Xingu River in northern Brazil. A couple walking along a nearby road hurried to hide behind a rubber tree. From that vantage point, they could see a shadowy figure approaching them. As it grew closer, they recognized the outline of a man, but the creature was covered in animal hair and emitted a vile smell. It screamed again, its blood-curdling call echoing under the forest canopy, before disappearing into the trees. The only evidence…
