Lack of moisture can lead to painful cracking and bleeding, which I typically prevent with a lip mask — they’re designed to retain moisture by creating a barrier between your lips and harsh ...

Abstract: Since the outbreak of the Covid-19 pandemic, masks have been widely used as a personal protective equipment (PPE) to prevent respiratory infection. A major type of masks used is non-woven ...

The practice raises familiar questions about data privacy. Video by Mark Thiessen and Rebecca Hale, National Geographic/Face-mask recognition technology courtesy Tryolabs Video by Mark Thiessen ...