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Did you know?

Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

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Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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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).

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Eugène Delacroix, The Death of Sardanapalus. Eugène Delacroix, The Death of Sardanapalus.
Eugène Delacroix, Study for The Death of Sardanapalus. Eugène Delacroix, Study for The Death of Sardanapalus.
An X-ray showing pneumonia. An X-ray showing pneumonia.
The Race-Ethnicity of the 3,170 Prisoners On Death Row The Race-Ethnicity of the 3,170 Prisoners On Death Row
Ten Leading Causes of Death in the United States, 2010. Ten Leading Causes of Death in the United States, 2010.
Major Causes of Death from Infectious Disease Major Causes of Death from Infectious Disease
Video: Interpreting a cladogram Animation

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