A drop of clear salty liquid secreted from the glands in a person's eye when they cry or when the eye is irritated.
Crying is as simple as blinking your eyes. It is a self-conscious act that we have barely any control over. We accept this unusual act into our lives as common place. But is it? Amongst any other species we are the only living organisms to be able to cry. Not cry as in wail, let out a yelp, but to actually produce liquid tears in vast amounts.
Why is this so you may ask. Well it is due to an adaptation lost somewhere far off in the past amongst our ancestors; Though this statement can raise some controversy. For example, was it an adaptation, or some kind of mutation within a cell, or a mutation in the amount of chemicals secreted by the brain causing us to have an emotional overdrive with a side effect of tears?
To us the brain is a very abstract and unknown realm. Certain things can be deduced such as the parts of the brains that are active during certain a