Best Answer:
Eyebrows have evolved as being important in the non-verbal communication process to each other. In a million years, the communication of eyebrows will hopefully be understood better, and convey non-verbal thoughts far more expressive than we could possibly fathom now. Here is an example of how eyebrows have evolved in just the past couple of decades.
Also, eyebrows are tweeked into shapes, usually arches. The arch has gotten higher over time. I suspect that the arch is here to stay, but there may be times when a wavy, swoop, or even some fancy design will become popular.
I also think that you would enjoy this FACS program that helps one decode facial actions.
I bet you are also wondering why we even have eyebrows. Well, I've got the link for that as well!
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