What Do the Period Designations PPN and PN Stand For

question 18

Essay

What do the period designations PPN and PN stand for? Why was this technological transition significant?

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Definitions:

Yellow Bile

One of the four humors in ancient Greek medicine, believed to be associated with the liver and to cause irritability and anger when in excess.

Black Bile

In ancient and medieval medicine, one of the four bodily humors, believed to be associated with melancholy.

Excess Phlegm

A condition characterized by the overproduction of mucus by the respiratory tract, often associated with colds, allergies, or infections.

Psychological Abnormality

Behaviors, thoughts, or emotions significantly deviating from the normative or cultural expectations, sometimes causing distress or functional impairment.