An unexplained explosion that occurred in 1908 in Russia.
The cause of the explosion has not yet been clarified. It is assumed that the meteor exploded 5 kilometers above the ground and completely destroyed the forest within 2,000 km2, without a visible crater.
Professor Leonid Kulik Aleksejvič the first expert who led the expedition in 1927 to investigate this event these are his photos.
Research continued in modern times, tunguska is even proclaimed a protected park and is tracking forest recovery.
No new research is available for the public.
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