The ''Indiana Jones of Astronomy'' takes readers on a fascinating hunt for scientific treasures On the morning of June 30, 1908, a comet nucleus or stony asteroid weighing 100,000 metric tons exploded four miles above the remote Siberian region of Tunguska with a force hundreds of times greater than the blast that destroyed Hiroshima. Eighty-four years later, American astronomer Roy Gallant was invited by the Russian Academy of Sciences to participate in its annual Tunguska Expedition. Gallant was the first American to take part in the Russian investigation of the largest meteorite impact in recorded history. So inspired was he by his experiences at Tunguska that he went on to devote the next eight years of his life to investigating and writing about meteorite impact sites around the globe. In Meteorite Hunter, Roy Gallant takes readers on a fascinating journey to the major meteorite sites of the wild and desolate Russian interior.