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Did you know?

Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

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In 1864, the first barbiturate (barbituric acid) was synthesized.

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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.

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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

Water striders serve as a model organism for the study of sexual conflict between males and females. Water striders serve as a model organism for the study of sexual conflict between males and females.
Model for cytoplasmic segregation Model for cytoplasmic segregation
A Simple Neural Model of Instrumental Conditioning A Simple Neural Model of Instrumental Conditioning
Typical quick-connect steps. Typical quick-connect steps.
Model for the bending of cilia and flagella Model for the bending of cilia and flagella
Ecological model for environmental health Ecological model for environmental health
Video: Bulk flow - factors that influence bulk flow

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