[muawiyah]

Australia was joined to South America and Antarctica at the time.

Can sharks walk?

[RightWingNilla]

Australia was joined to South America and Antarctica at the time.

How do you know this? Were you there? Has anyone reproduced this in a lab?

[PistolPaknMama]

Australia was joined to South America and Antarctica at the time. Can sharks walk?

Is there a point to this? You didn't answer my original question regarding what resources sharks and marsupials would have been competing for that would have compelled the marsupials to drive the sharks off the Austrailian land and banish them to bear their young in the water.