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Thanks for the reply, BJS.
Yes, I could easily dig out the original publication. But for me the major purpose of this Science blog is to get new, reliable, scientifically truthful, interesting information in a concise review-like form. For this someone has to digest original publication and possibly use additional information to compile a new story. Some assurance that the scientific facts and logic were not perturbed, for me, is the quality of the source of the story. I would like to learn something about nature without scrutinizing the raw data and methods of the original publication.
News agencies refer to each other if they use some of the information from outside, scientists mention previous publications in their papers. It is a good and important habit. I think to have references (unless it is an original work) is crucial for all science and every Science Blog. I hope you and other science bloggers will agree with me. With respect, Baz.