Scientists call it the Great Dying, a 250-million-year-old catastrophe that wiped out 90 percent of ocean species and 70 percent of land species in the biggest &to=http:// english.pravda.ru/society/2002/01/11/25263.html ' target=_blank>mass extinction in Earth's geologic history.
The cause of this cataclysm is a matter of great dispute among paleontologists, but research released Thursday offers new evidence that &to=http:// english.pravda.ru/science/19/94/377/14519_climate.html ' target=_blank>global warming caused by massive and prolonged volcanic activity may have been the chief culprit.
Russia may terminate all kinds of military and military-technical relations with Israel, including the agreement on the exchange of reconnaissance data
The Kremlin is very concerned about the events related to the crash of the Il-20 Russian military aircraft in Syria
Representatives of the Russian Defence Ministry said that the missile that shot down the passenger Boeing 777 aircraft over the Donbass on July 17, 2014, was manufactured in 1986