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President Trump cracked jokes at the redo of the White House Correspondents' Dinner on Friday night, after an armed assailant upended April's dinner.
"It doesn't require any new technology development, which is almost unheard of for solving a LIGO instrumentation problem.
An unusual 2,800-year-old Mesoamerican burial found in El Salvador included a face-down skeleton clutching a sea turtle vessel.
Chinese astronomers report the detection of a peculiar optical transient event that occurred in the center of a dwarf galaxy. The newly discovered event, designated AT2019ijn, is a fast-rising, slow-decaying blue optical transient with exceptionally bright radio emission. The finding was detail...
Fraser Jackson has more.