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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.
The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.