It appears that I was naive to assume the Tunguska explosion of 1908 had been adequately explained. It was a meteorite or, more probably, a comet that exploded above a remote area of Siberia, wasn’t it? Not necessarily! This fascinating book shows that we still await a completely adequate scientific explanation and the jury is still out on what precisely the object was.
![](https://geologybook.com/wp-content/uploads/2020/07/Tunguska-Mystery-2-1-e1596479573179.jpg)