On June 30th, 1908,
                                                something exploded 8 km
                                                above the Stony Tunguska river.
                                                About 2150 square kilometres of
                                                Siberian taiga were devastated
                                                and 80 millions trees were
                                                overthrown. Up to now, it is
                                                not clear whether the great
                                                explosion was due to a comet or
                                                an asteroid or something else.
                                                We are searching for an answer.
                                              
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