In Phenomenon: The Lost Archives -- Tunguska, the Russian Roswell, viewers investigate the destruction of 200 square miles of Siberian forest just prior to the Russian Revolution in 1908. Was it, in fact, the impact of an asteroid that caused the explosion? Or was it the crash site of a UFO?

[Recently I have heard some trying to link Tunguska to a Telsa experiment gone wrong or some speculate that it is
related to the ancient alien phenomenon,,,]