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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.

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Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

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The horizontal fraction bar was introduced by the Arabs.

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Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.

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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

A historical timeline of regulatory acts, standards, and organizations A historical timeline of regulatory acts, standards, and organizations
Spike Lee (director and producer), When the Levees Broke: A Requiem in Four Acts. Spike Lee (director and producer), When the Levees Broke: A Requiem in Four Acts.
A typical reaction in which NAD+ acts as an oxidizing agent A typical reaction in which NAD+ acts as an oxidizing agent
Natural selection acts on genetic variation Natural selection acts on genetic variation
The enthalpy change for converting 10.0 g of ice at -25.0 C to water at 80.0 C is ________ kJ. ... The enthalpy change for converting 10.0 g of ice at -25.0 C to water at 80.0 C is ________ kJ. ...
If 0.40 mol of NaN3 reacts completely in the reaction shown below, then ________ L of N2 will ... If 0.40 mol of NaN3 reacts completely in the reaction shown below, then ________ L of N2 will ...
Video: Regulation of GFR: autoregulation via myogenic mechanism Myogenic mechanism

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