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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

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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.

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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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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

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Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Operant conditioning, also known as trial-and-error learning. Operant conditioning, also known as trial-and-error learning.
Biology deals with the study of the many varieties of living organisms. Biology deals with the study of the many varieties of living organisms.
Risk-taking behavior by young males. Risk-taking behavior by young males.
Serotonin and Risk-Taking Behavior Serotonin and Risk-Taking Behavior
This map shows the percentage of Protestants by state in Germany. When compared to the previous map This map shows the percentage of Protestants by state in Germany. When compared to the previous map
Children with insecure attachments may show angry behavior with peers, which can lead to peer ... Children with insecure attachments may show angry behavior with peers, which can lead to peer ...
Video: Fetal development - Weeks 9 to 38

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