Entertainment

Science reveals secrets of mummy portraits

(A) “Portrait of a man with a beard” (Waters Art Museum # 32.6), date c. 170-180 CE from Roman Empire Egypt; (B) Portrait under ultraviolet light. A purple cleavage appears pinkish-orange on the shoulder, indicated by an arrow. Credit: The Walters Art Museum. How much information can you get from …

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Respirators are more effective than surgical masks to protect against infection – here’s how they work and who should wear them

રા Samara Hayes / Getty Images Inhalers like N95 face masks are needed to protect health care workers from illness. Samara Hayes / Getty Images Respirators work to protect health care and emergency workers from inhaling chemicals or infectious particles. Respirators such as N95 face masks are more effective than …

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