Hi folks, I was sitting around today and got a little upset about the fact that we haven't gotten any new great pyramids in a little while. Any word on when the aliens are coming back to help us build them? Those rocks are definitely too big to move on our own.
While it seems like it has been a long time on a human scale, on the grand scale of history the alien pyramid builders really haven't been gone all that long, their last project completed in 1993 (and just long ago enough that I can discuss it here).
As for the methods used to track the patterns and predict the appearances of the alien pyramid builders you will have to ask someone at /r/askscience since discussing that would violate our 20 year rule here.
I'm not sure if /r/shittyaskhistorians exists but I'm sure /r/shittyaskscience would love to answer this, to them, every day is April 1st.
Edit: Also, maybe aliens create pyramid schemes in jobs.