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>>25582923 >Can it be quantified somehow, how expensive it is? Yeah, we literally quantify it in calories. Nervous tissue is fucking expensive to upkeep, and it's working 24/7, even when you're sleeping. Bigger brains are made up of more nervous tissue, and more complex brains require more calories to feed them. A pair of wings however aren't burning very much energy when you're not using them, because wings are just muscle tissue connected to bone. Studies have been done on selecting for intel…⏱ 2w↩