Tears

Tears are a clear liquid secreted by the lacrimal glands found in the eyes of all land mammals. Tears are made up of water, electrolytes, proteins, lipids, and mucins that form layers on the surface of eyes. The different types of tears—basal, reflex, and emotional—vary significantly in composition. The functions of tears include lubricating the eyes, removing irritants, and also aiding the immune system. Tears also occur as a part of the body's natural pain response. Emotional secretion of tears may serve a biological function by excreting stress-inducing hormones built up through times of emotional distress. Tears have symbolic significance among humans.

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CDC: Artificial Tears Eye Drops May Be Linked To 50 Infections, One Death

Black Hole Tears Apart Unlucky Star – NASA Gets Unusually Close View of Dramatic Destruction

Astronomers Watch In Awe As A Giant Black Hole Tears Apart A Star 12.4 Billion Light-Years Away

Dogs Shed Tears of Joy When Reunited With Their Owners, Scientists Say

Dogs Shed Tears Of Joy When Reunited With Owners

'iTEARS' could help diagnose diseases by isolating biomarkers in tears

Astronomer Says New Webb Space Telescope Images “Almost Brought Him to Tears”

Astronomer Working With Webb Said the new Images “Almost Brought him to Tears.” We’ll see Them on July 12th