My mind has been blown! I’ve just been told about a colossal explosion that took place in Russia in 1908. Apparently, the explosion over the sparsely populated Eastern Siberuab Taiga flattened 2,000 km2 (770 sq mi) of forest yet caused no known human casualties. The explosion is classified as an impact event, however, no impact crater has ever been found, and it is thought that the actual impact was caused by the air burst of a meteroid that disintegrated at an altitude of a mere five to ten kilometres (rather than hit the surface of the Earth). More info about it here – https://en.wikipedia.org/wiki/Tunguska_event
I’m fascinated by the idea that something so epic could take place in outer space, and have an such an enormous impact on the earth and environment. I’m now VERY excited to try to watch BBC Earth’s “Best of 2016” list http://www.bbc.com/earth/story/20160706-in-siberia-in-1908-a-huge-explosion-came-out-of-nowhere to find out more about “the explosion that came from nowhere”.