There are 20 feet of blood vessels in each square inch of human skin.
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There are 60,000 miles of blood vessels in every adult human.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
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There are more sensory neurons in the tongue than in any other part of the body.
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Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.
Catbirds and robins reject objects shaped similarly to cowbird eggs no more frequently than objects
Type C killer whales in the Ross Sea. The eye patch slants forward.
Jaguar F-type front
Action of type I and type II topoisomerases, as shown by gel electrophoresis