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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
There are more nerve cells in one human brain than there are stars in the Milky Way.
Your heart beats over 36 million times a year.
Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.
Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.