All animals use eggs to procreate. Previous to that, procreation must've been through mitosis. If today's fauna still used mitosis for procreation, the process would be uglier than it already is

Daddy chicken did

int 🐔 = 1.0;
int nonchicken = 0.0;
int 🥚 = 🥚 + n ;
while ( 🥚 < 🐔 ) , { nonchicken + n };
if ( nonchicken > 0.0 ) then { 🐔 = 1.0 };

Don't know if this will compile, but there should be an infinite number between 0 and 1, and 'n' should be the biological gap between species.

There should be one more line code to poll the value for the paradox, but I'm going to bed now.

So birds and crocodiles had one mother.

which came first, the platypus or the egg?

Nothing.

I don't care. Just give me that yummy eggs Benedict from "The Commons Neighborhood Eatery".

Chickens are dinosaurs

This has been my go-to answer for years now. Eggs existed before chickens did. You could say they Eggsisted first.