The Washington Post is providing this news free to all readers as a public service. Follow this story and more by signing up for health, science, and environment email alerts. On Friday, President ...

Guidance on whether to wear a face mask varies locally. But the Centers for Disease Control and Prevention has recommended that all Americans, healthy and sick, wear basic cloth masks in public — a ...

Like all Hackaday readers, we pride ourselves on having at least a passing acquaintance with how most things work. But we suspect to a lot of people, things we take for granted — computers, air ...