Off topic: Bob Dylan lyrics, smell and death, illustrating science, samples at Costco

Bob Dylan-loving Swedish scientists. Study suggests decreasing sense of smell may be harbinger of impending death. An animated chart of butterflies, and other science illustrations at Tabletop Whale. And psychology 101 at the nearest Costco: on free food samples and reciprocity.


Photo: Bob Dylan is awarded the Presidential Medal of Freedom by President Barack Obama at the White House in Washington, D.C., Tuesday, May 29, 2012. (Olivier Douliery/Abaca Press/MCT)


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