At 7.17am on June 30, 1908, an explosion like a hydrogen bomb erupted in Siberia - and until now, scientists have offered no conclusive explanation for the event.The Tunguska event occurred near the Tunguska River in SiberiaItalian scientists claim to have found chunks of a meteorite in nearby Lake Cheko Seismic reflection and magnetic data revealed an anomaly close to the lake center, about 30ft below the lake floor compatible with the presence of a buried stony object and supports the impact crater origin for Lake Cheko.' 'The sky split in two and fire appeared high and wide over the...