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Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
The longest a person has survived after a heart transplant is 24 years.
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