hmmm.....When turtles lay eggs, the shells are soft and rubbery and harden after being laid. Who knows what dinosaur eggs were like millions of years ago, so I would say the rubber bag came first.... Abusive comment hidden. (Show it anyway.)
When turtles lay eggs, the shells are soft and rubbery and harden after being laid. Who knows what dinosaur eggs were like millions of years ago, so I would say the rubber bag came first....