Albert FallJune 30, 1908: What is believed to be a huge asteroid explodes in the lower atmosphere near Siberia's Tunguska River. The impact levels trees for dozens of miles in all directions in an explosion as powerful as 185 Hiroshima-sized nuclear weapons. The asteroid is estimated to have been 120 feet in diameter.

June 30, 1924: Former U.S. Interior Secretary Albert Fall (at right) is indicted for bribery in the Teapot Dome scandal. Five years later, Fall is convicted, fined $100,000 and sentenced to one year in prison for accepting no-interest loans and kickbacks in exchange for issuing no-bid oil leases to political cronies.

June 30, 1992: New York City formally ends its age-old practice of dumping its sewage sludge into the Atlantic Ocean.

Photo: Biographical Directory of the United States Congress

This feature is compiled by Peter Dykstra, an MNN contributor and publisher of Environmental Health News and The Daily Climate.