[Which came first the turtle egg or the chicken?]
It's turtles all the way down!!!
<?:^)
Point the second. If some Jungian-like super-consicousness of the group was savvy enough to intuit that birds popped out of reptile eggs at some point in natural history what do you think the possibility is that that super-consciousness would encode that finding into a creation legend of turtle upon turtle upon turtle "all the way down", eh?