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Did you know?
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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There are more bacteria in your mouth than there are people in the world.
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Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.
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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
![Deciduous and permanent teeth. (A) The deciduous teeth, with the age of eruption given in months; (B](https://biology-forums.com/gallery/47/medium_14755_30_09_12_4_39_18_91421720.jpeg)
![This photograph of a Union soldier just freed from Andersonville prison, stunned and enraged norther](https://biology-forums.com/gallery/47/medium_376063_22_08_15_11_28_16_22363695.jpeg)