The original version of this story appeared in Quanta Magazine. All of modern mathematics is built on the foundation of set theory, the study of how to organize abstract collections of objects. But in ...

Turning off the lights and closing the curtains isn't exactly a catchy, new sleep hygiene hack, but this common sense advice is gaining even more scientific credibility. Many Americans sleep in a room ...

Objectives This study aims to estimate the prevalence and associated factors of anxiety, depression and stress symptoms among doctors working in hospitals with COVID-19 treatment units in the ...