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Gagarin became a legend when he became the first person to blast into space on April 12, 1961. With his infectious humor, movie star looks, and impressive charisma he quickly captured the imagination of an entire generation. …

A new study confirms this consensus and provides helpful details for buying or making a mask.

Masks made of two or three layers of cotton and other filtering materials can capture up to 90% of the particles. The effectiveness was similar for exhaling and inhaling, Marr and her colleagues found.

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