In the distant past, mysterious non-human beings were witnessed in Tanzania, East Africa. People saw them and recorded their presence for future generations in form of paintings. These paintings found high up on the hills, depict an extraterrestrial visitation and were created 29,000 years ago!

In Australia, more than 100,000 rock art sites have been discovered. Many of them are extraordinary in a number of ways. According to Aboriginal religious belief, some drawings of their ancestral beings have been present on the rock walls since mythical times.

The rock paintings in Australia are rumoured to be around 40,000 years old or even older. The meaning of the paintings are unknown and shrouded in mystery.

Egyptologists allege that Ramses II. had his artisans alter and doctor certain inscriptions engraved there in honour of his father's exploits, so they would appear as his own. The original hieroglyphs had been creatively plastered over, and reingraved, they say. The plaster was by far not the best in Egypt, and as it suffered the inevitable erosion, there appeared an entirely new set of glyphs, which together evoke an illusion of an array of technologically advanced craft.
Such combined inscriptions are known under the name of "palimpsest", a term which originally referred to an image given by two, or more combined writings on the same writing surface, usually vellum. Although erased, the original inks would eventually seep back to the surface, sometimes with unpredictable consequences.