Gastroliths
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Many meat eating animals consume pebbles and rocks to help them break down meat and grind it up for digestion. How come humans don't need to do this?
Since that behavior is now uncommon than not, wouldn't it make more sense to ask why some species DO need to do that?
>>7809772
Because we chew?
Retard
>>7809772
>How come humans don't need to do this?
Because through evolution we have assimilated tens of thousands of different species of microbes that now make up our intestinal fauna and expedite food digestion.
>>7809772
The animals that do that tend NOT to be meat eating, such as birds and Diplodocidae and shit.
>>7809772
Because we have pills to ease digestion duh
>>7809772
Because we invented cooking.
>>7809772
Because we only recently began eating meat