AMSTERDAM, Feb 14 (Reuters) - The world's chemical weapons watchdog on Friday said it had once again found traces of tear gas on the frontline with Russia in Ukraine's central-east Dnipropetrovsk ...

The nervous system is a complex network of neurons and cells that carry messages to and from the brain and spinal cord to various parts of the body. A team led by University of Pittsburgh School ...

A constant watery eye Tears fill the eye and run down the face. This happens even when not crying. The eye is not red and the eyelid is not swollen. Both sides are blocked in 30% of these ...