The Vatican says Pope Francis rested during a peaceful night. The brief update came after doctors said the 88-year-old pope ...

RESEARCHERS have discovered a fundamental mechanism that affects the size of the pupil, namely our breathing. The study shows that the pupil is smallest during inhalation and largest during exhalation ...

Asthmatic respiratory crisis indicates the pope struggled to maintain a sufficient oxygen level when breathing on his own, according to medical experts.

For more than a century, scientists have understood that three factors control pupil size: light, focus distance, and ...

Gladstone researchers create a drug that replicates the cellular effects of low-oxygen therapy to treat inherited ...