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Provides background and analysis for a paper that attempts to explain what happened to the fragment of the object that exploded over Tunguska, Siberia in 1908. The paper by V.V. Svetsov found in the October 24, 1996 issue of `Nature'; The history of scientific research of the Tunguska explosion; The controversy between those who believe the object was a comet and those who believe it was an asteroid.

The author reflects on meteor strike at the town of Chelyabinsk in the Russian Ural Mountains on February 15, 2013. The author states that the meteor had briefly blinded commuters as well as shattered thousands of windows with a series of ear-splitting explosions. The author says that more than a dozen monitoring stations worldwide captured the ultralow-frequency infrasound signal of the meteorite as it broke up in the atmosphere.