Usually, mentioning UFOs and visitors from outer space, people are referring to the present, with its technological advances, space exploration and high technology. But a number of scientists studying the paleocontact theory say that maybe once they visited the planet who shared their knowledge and technology to the people of ancient times. This theory may seem funny or pseudo-scientific, but there is evidence, for example, the rock carvings of flying machines as similar to the “current” UFO or a picture of medieval art with the characters, one to one similar to modern astronauts. But the theory is a theory, and you have the right to believe her or not. We simply show you the best pictures.