Comment on egg time
WhiskyTangoFoxtrot@lemmy.world 3 days agoWell, you have to be descended from a particular branch of the evolutionary tree that has the ability to secrete milk from mammary glands. If, say, a mollusc independently evolved milk production that wouldn’t make it a mammal.
JasonDJ@lemmy.zip 2 days ago
They wouldn’t independently evolve mammary glands, because only mammals have mammary glands, and they are not mammals, but mollusca.
I’d say that’s a bit of a chicken/egg situation, but I don’t think we need to bring in more classes.