...not long after sunset. (And you laughed at MR when he mentioned dimensional portals) My science-fiction fueled imagination likes to imagine there is some alien CERN at the other end of this, an alternate-reality high-energy physics experiment gone very awry. Please Register or Log in to view the hidden image! Lots of weird things happen in Siberia. (Tunguska, the Denisovans...) Kind of like the southwestern desert here in the US with its Roswell and Area 51. Yes, there's an official explanation for this Siberian apparition, but I'll leave it to our Sciforums wizards to discover what it is.