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It seems nonsensical to me that simply eating meat protein could somehow cause a genetic change leading to great-grandchildren with larger brains.
by marshray 6y ago
It seems nonsensical to me that simply eating meat protein could somehow cause a genetic change leading to great-grandchildren with larger brains.
- jjk166 6y agoIt doesn't cause the genetic change, the genetic change is random. But if you were, simply by chance, born with a bigger brain that required more calories to support, you would be at a disadvantage to everyone else, and your mutation would quickly die out unless you were in a situation where you had excess calories available, such as by eating meat.
- yellowapple 6y agoIt doesn't seem that nonsensical to me when considering things like epigenetics. It also doesn't seem all that nonsensical if you flip the causality to "some genetic change resulted in more brain activity/growth and necessitated more protein consumption as a result".
- marshray 6y agoRight, phrasing it as "meat causes brains" confuses the direction of causality and fails to explain all the meat-eating animals that didn't grow large brains.