Throughout the world, petroglyphs that seem to depict alien contact can be found.
Last week I ran across a mention of UFOs and aliens as depicted in petroglyphs, and I have been utterly smitten with the topic ever since. Petroglyphs abound throughout the world, with many found right here in the United States. Petroglyphs themselves are fascinating, being a record of someone's doodle (or religious ceremony, or depiction of real life events, or whatever other meaning you want to assign to them - most likely, "all of the above, depending on the petroglyph") from tens of thousands of years ago.
Petroglyphs are art that was carved or chiseled directly into rock in prehistoric times. Unlike other forms of prehistoric art (like cave paintings), petroglyphs would have been both extremely difficult to create and permanent. Think about how hard it would be to carve a drawing into a rock face: obviously you would only do it if you had a real, burning need to do so. Petroglyphs are the ultimate form of permanent art, communicating across the space of thousands of years.
And throughout the world, petroglyphs that seem to depict alien contact can be found. A lot of these are no doubt just a function of us modern people projecting our imagination upon a somewhat suggestive figure. For example, this supposed UFO (from Mockingbird Canyon in California) looks a lot more like either a wild berry or a fish egg, along with what is probably either a basket for collecting berries or a woven fish trap. It's all about the context you bring to the experience. But one has to ask, is it more likely that ancient peoples were depicting a UFO experience, or passing along information on gathering food?
Other supposed alien depictions seem to be relying on the size differential and difference in clothing between the figures being shown. As is the case with this petroglyph from Ridgecrest in California. But the more obvious interpretation is that these are showing people of different ages and social statuses - adults and children.
Still others may be depicting bizarre ceremonial costumes, fictional characters, imagined prophecies, or bad dreams. But it's sure hard to look at a petroglyph like this from Utah and NOT see a cheerful robot. Much less to look at this one and not see a classic 1950s UFO.
Which brings us to the final problem: it's difficult to determine how legitimate some of these petroglyphs really are. An archaeologist would be able to tell if a petroglyph was carved into rock 10,000 years ago or only 10 years ago, but none of these petroglyphs has, to my knowledge, been officially authenticated. And so we are left to wonder, as is so often the case.