There are many reasons why one may cry, and as is well known, they are not all bad or unpleasant, on the contrary. What is known somewhat less are the countless, surprising functions of tears, both when they flow in the wake of an emotion and when the tearing is spontaneous and related to environmental or internal factors within the eye. Do you feel prepared on the subject? Test yourself with this quiz. But try it even if you think you know little about it, because you will learn many interesting things from the experts’ answers.
Tired? If you get little sleep…
Insufficient sleep can cause reduced physical energy and recurrent sleepiness.
