Pentagon releases new batch of UFO files: "Did you see that?"

The Pentagon on Friday released a new batch of documents and images related to UFOs, the fifth disclosure in recent months ...
C&EN

Enhanced Flotation Separation of Low-Rank Coal with a Mixed Collector: Experimental and Molecular Dynamics Simulation Study

School of Mining Engineering, Heilongjiang University of Science and Technology, Harbin 150022, PR China ...