Horizon cases. They may be a kind of detective story you're familiar with. They're endlessly intriguing, covering the most bizarre, most ancient, or most mysterious events ever observed or things left behind. Their strange natures make them prime fixations for creative types, spawning endless 'what ifs' and possibilities, like spooky, weird podcast episodes and novellas. The same qualities making these events interesting make them frustrating and disappointing. Like walking towards the setting sun, we can continually think about and research horizon cases, yet, as we can never touch the sun on the horizon, the answers of a horizon case will always be out of reach. Horizon cases can have no final resolution.

Now, you might be thinking, "Why can't we answer these sorts of questions?", and that depends on the topic. Some of these cases have happened so long ago that clues, context, and data in general are lacking. If any evidence does remain, it isn't helpful. Complicating things further, some horizon cases are so bizarre that we have no frame of reference for them. A few even seem to go against our current understanding of the world. Our grasp of organisms, physics, the universe - how everything works. Without out new technology or information, the best a horizon case can be given is an educated, shrugging guess.

Horizon cases can cover weird phenomenon like meat falling from the sky, multiple deaths with no apparent cause, and, more often, suspected alien activity. You can start with any case for a, well, mostly self-contained story. But as for me, I like to start my investigations at the beginning.

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Before the advent of written language and record-keeping, humans created art: shell and bone engravings, wood and stone figurines, and upon rocks, paintings and drawings. Through art, they spoke. They said, "I was here," and "This was important to me." They tell us, "This is something that happened," "This is something I saw." While every piece of prehistoric art is extraordinary, leading to a better understanding of human development and past experiences, some are exceptionally intriguing. Amidst depictions of extinct animals, stencils of hands, and long-forgotten great hunts are memories of living beings and things seemingly not of this world—and perhaps not of this time.1

Depictions of so-called ancient aliens and ancient astronauts are exceedingly rare. Nevertheless, at least one or the other exists in all prehistoric art forms. By studying their imagery, narratives, and analyzing how, when, where, and why they were made, much can be learned. From frightening, supernatural figures and objects in the sky to violent encounters, abductions, and being watched from afar, these old stories are not too different from today's alien encounters.

Spanning prehistory, BCWPA has thoroughly researched these early horizon cases and constructed a timeline of Earth's alleged extraterrestrial history. Here, we begin in the Middle Paleolithic: 100,000 years ago in South Africa, where the earliest evidence of a human drawing has been recovered. There are no strange creatures on rocks here, but, its important to first know how these artifacts were created.

Timeline of Extraterrestrial Life - Cave Paintings