> The origins of the earlier monoliths were never revealed, sparking conspiracy theories involving aliens or that the appearance of the structures is an elaborate, highly coordinated prank.<p>The source of the originals has been known for years, and would be trivial to find out with a basic search, but I guess that's too hard for people these days...<p>Answer: A couple of youtubers made them for a laugh:
<a href="https://www.youtube.com/watch?v=j-pKKM6CXr0" rel="nofollow">https://www.youtube.com/watch?v=j-pKKM6CXr0</a>