Since that was written, meteorite fragments have been found, supporting the more conventional explanation. https://www.technologyreview.com/s/514511/first-tung

Since that was written, meteorite fragments have been found, supporting the more conventional explanation. https://www.technologyreview.com/s/514511/first-tunguska-meteorite-fragments-discovered/ https://www.technologyreview.com/s/514511/first-tunguska-met...