Originally posted by resonance
also, how did it come about that various species give birth in different ways..inside the body, outside the body
Actually this was explained in Scaly Dinosaur Bible. From the Book of Timothy T-rex, chapter 2 verse 8 (translations in brackets):
And it came to pass that Timothy, Tommy the triceratops, and Barry the brontasaurus cast their gaze upon the heavens and lamented, “Rooar?”
{Verily, Lord, We are vexed by the sins of my brethren lizards. They doth consume the flesh of their brother lizards, and lusteth after their
neighbor’s mates. Is there no salvation for us, Lord?}
To which the Lord replied, “Roar, Rowwlll, Errrr.”
{Fear not, righteous Timothy, for I bring thee tidings of great joy. Born to you is a savior this day in the land of Pangea. Follow the bright,
shining new star in the east and behold the salvation of the world. Oh, and bring gifts.}
So the three dinosaurs crossed the great desert with the star’s guidance, whereupon they came upon a cave. And lo, they beheld the miracle. A savior
born not of egg, but carried inside his mother’s womb, emerging fully formed. Overcome by the miracle of live birth, Tommy cried, “Arrrhhhh,
Owwwlll!”
{Lord, we have faithfully followed yonder star, and it has led us to a rat. How can it be that this mammal is the savior of the world.}
And the Lord answered him, saying, “Aaaaroooooww!”
{Well, technically, that’s not a star, it’s a meteor …}