How do they know? Maybe the wolf/dog followed the boy and eventually the boy was no more. Truth is ... we "don't" actually know, we only surmise - the "boy" could've been the "dog's" eventual dinner. So, yes, I guess there was a relationship!
"The Baptism of Christ", by Aert de Gelder, painted in 1710 and hangs in the Fitzwilliam Musuem, Cambridge. A disk shaped, UFO type object is shining beams of light down upon John the Baptist and Jesus.
Clonycavan Man, named after the area he was found, was one of two bodies discovered in a peat bog in the Republic of Ireland in 2003. The chemical composition of the peat mummified the body, enabling scientists to recreate his face.
Mayan Astronaut | Forbidden History. This is a Maya stone carving from Palenque, Chiapas, Mexico. After careful review, many believe it is a detailed representation of a space vehicle- with many recognizable parallels to our own space shuttle, such as the position of the astronaut. While stylized, many see clear depiction of antenna, flight direction system, turbo compressor, control panel, tanks, combustion chamber, turbine, and exhaust.