June 30

All it takes to ruin my day is yet another unexplained cataclysm. I just hate it when that happens, don’t you? On the 30th in 1908, in Krasnoyarsk Krai, Russia, near the Tunguska River, a massive explosion leveled an estimated 840 square miles of forest. You can call it whatever you want to call it, either the Tunguska Event, or the Great Siberian Explosion; either way it has yet to be definitively explained.