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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

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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.

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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.

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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

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When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

A human pedigree containing inbreeding. A human pedigree containing inbreeding.
Chimpanzees live in complex kin groups in which lifelong bonds and individual personalities play key Chimpanzees live in complex kin groups in which lifelong bonds and individual personalities play key
How the neural plate develops into the neural tube during the third and fourth weeks of human ... How the neural plate develops into the neural tube during the third and fourth weeks of human ...
Structures of human DNA polymerase g (left) and T7 phage DNA polymerase (right) holoenzymes Structures of human DNA polymerase g (left) and T7 phage DNA polymerase (right) holoenzymes
Structure of human immunodeficiency virus Structure of human immunodeficiency virus
Structures of the Human Eye Structures of the Human Eye
Video: Cellular Respiration & Glucose Mobilization (Glucose transport & Phosphorylation of Glucose)

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