How does science explain the fact that from all of the species only mammals can smile or show facial expressions
There are many ways to communicate and facial expressions appear particularly expensive when one considers the detailed movement of the nervous system and muscles involved.
>>16143997I dunno. How does science explain that humans parrots, and bees are the only terrestrials who dance?
>>16143997lizards are the only animals who can knxbzkskeb (humans do not have a word for it)
>>16143997That's cap bro my fish smiles all the time
>>16143997Mammals are the only ones with complex enough muscles in the lips. There’s only like one or two reptiles capable of moving their lips to expose their teeth
>>16143997>only mammals can smile or show facial expressionsbiased observation: we don't know that for sure. Just because we can't detect or see them that doesn't imply other animals do not notice and communicate with micro-expressions.
>>16144929>biased observationthanks anon this is the only sensus observation from this thread for wich i waited 24 hours long
>>16144481The future liberals want.
