The study shows that transparent face masks, which suppress respiratory droplets that spread the SARS-CoV-2 virus, do not occlude facial expressions. There were also some limitations to the study, due ...
(CNN) — In H.G. Wells’ 1897 science fiction novel, “The Invisible Man,” the protagonist invents a serum that makes the cells in his body transparent by controlling how they bend light. More than 100 ...
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