A scientist whose research tests the effectiveness of different fabrics at filtering out airborne particles says new guidelines for mask-wearing stress the importance of close fit and effective materials.
The Bay Area is a hub of artistic expression, attracting artists, writers and musicians from around the globe to live, work and create. We highlight some of the offerings here.
The influential and pioneering nuclear physicist Chien-Shiung Wu participated in the Manhattan Project during a career that spanned more than 40 years.
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