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Did you know?
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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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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The longest a person has survived after a heart transplant is 24 years.
Did you know?
In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.