Wearing a facemask helps limit the spread of COVID-19 by reducing respiratory droplets and aerosols spewed into the air when people breathe, talk, laugh, sneeze or cough. But the physical barrier created...

Imagine you’ve just arrived in Paris. Your body thinks it should be midnight—a restorative time when your cells typically proofread DNA, organize and store energy, and perform other essential...

A novel study shows that face mask use does not affect indicators of cognitive performance when the wearers are resting or performing moderate physical work in hot environments. However, wearing a face...