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Marine Corps to ground all aircraft after recent deadly incidents

Marine Corps to ground all aircraft after recent deadly incidents

Business
Aug. 11 (UPI) -- The U.S. Marine Corps announced today that it will undergo a 24-hour stand down of all its aircraft within the next two weeks in response to several incidents as part of an operational reset.Marine Corps Commandant Gen. Robert Neller has ordered the pause so aviation units can review safety regulations."The intent is for flying squadrons to review selected incidents which occurred enterprise-wide and study historical examples of completed investigations in order to bring awareness and best practices to the fleet," the Marine Corps said in a press release.The Marine Corps says that active operations will not be affected, and that commanders will have discretion over when to do the pause over the next two weeks.The aim is for commanders and flying squadrons to review selecte...
Paleontologists identify extinction event among marine megafauna

Paleontologists identify extinction event among marine megafauna

Science
June 26 (UPI) -- The disappearance of terrestrial megafauna -- like wooly mammoths and saber tooth tigers -- during the last ice age is well documented. Now, scientists have found evidence that marine megafauna also suffered a previously unknown extinction event.Paleontologists at the University of Zurich analyzed marine fossils dated to the Pliocene and Pleistocene epochs, from 5.3 million to 9,700 years BC."We were able to show that around a third of marine megafauna disappeared about three to two million years ago," lead researcher Catalina Pimiento, a scientists with Zurich's Paleontological Institute and Museum, said in a news release. "Therefore, the marine megafaunal communities that humans inherited were already altered and functioning at a diminished diversity."Fossil analysis sho...