In 1908, over the Tunguska taiga, in the area between the Nizhnyaya and Podkamennaya Tunguska rivers, just north of the small trading post of Vanavara, an unknown space object, which is considered to be a meteorite, exploded. Its mystery has not yet been solved. The first scientific expedition of Professor Leonid Alekseevich Kulik went to the site of the disaster only nineteen years later. More than a hundred years passed, and the cosmic phenomenon was repeated with localization in approximately the same place, but this time answers to numerous questions were found quite quickly.