Post-Soviet States Military Technology Post-Soviet Era India-Russia Relations Afghanistan North Korea Middle East Nuclear Proliferation Afghanistan Invasion Space Race Russian History Intelligence Operations Middle East Politics Military Bases European History Moon Missions United States Solidarity Movement Strategic Arms Reduction Treaty Nuclear Arms Race Military Incidents Military Conflicts Political Collapse Post-Soviet Economic Policies UFO Incidents Military History Communism Russia U.S. Relations Military Infrastructure Collapse of the Soviet Union Immigration Korean War U.S.-Soviet Relations Military Alliances Kremlinology Democracy Movements Military Strategy USSR Intelligence Agencies Belarusian SSR Cultural Symbols Post-Soviet Russia Nuclear Weapons Infrastructure Diplomatic Relations Nuclear Testing History Aerial Incursions Propaganda Techniques Khrushchev Cultural Collaborations Political Outcomes Indochina Authoritarianism Political Legacy Chernobyl Cultural Influence European Integration Geopolitical Geography KGB Spy Exchanges Espionage Hungarian Uprising Emigration Bioweapons Program Leningrad Secret Police Middle East Policy Syria Dissolution
NASA attributes the frozen oval lagoons to permafrost thaw shaped by wind-driven waves.