Northern Spotted OwlNov. 22, 1955:  Soviet Physicist Andrei Sakharov leads the development of the USSR’s first fusion weapon, successfully tested with a yield of 1.6 megatons.

Nov. 22, 2004:  Completing a five-year review against a backdrop of political controversy, the U.S. Fish and Wildlife Service reports that the Northern Spotted Owl (at right) still deserves protection as a threatened species.

Nov. 22, 2009:  Twenty years after his entry into activism to protect the Amazon, rock star Sting tours Brazil to raise concerns about proposed hydroelectric dams in the Brazilian rainforest.

Photo: Wikimedia Commons

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