In the section "Investigating Life: Did a Myosin Gene Mutation Make Humans Brainier?",what did the researchers propose as the selective advantage for a smaller temporalis muscle?

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The researchers propose that a smaller temporalis muscle would provide a selective advantage for a larger brain because a smaller muscle would require less energy to operate, leaving more energy available for the development of a larger brain.

In the Section "Investigating Life: Did a Myosin Gene Mutation