Does watching someone else relieve a nagging itch spark the same impulse in you? A study in mice suggests contagious itching may have evolved as a reflex to protect animals from threats. Now, Chen and ...

Pupil size in response to light could serve as a biomarker for concussion, according to a study published in Life. “A concussive injury to the brain is associated with changes in the PLR [pupillary ...

Photic sneeze reflex is a condition triggered by exposure to bright light. Around 35% of the population has this reflex. Sneezing is a natural response that removes irritants from your nose. But while ...