[TwoPhonesOneKid]

You could also cross in a raft. Or on a log. You can swim across (riskily, quite riskily) at the straight of gibraltar itself. We've known humans have been seafaring tens of thousands of years before our earliest archaeological evidence (although dugout canoes are likely just as old, it's very bad conditions for preservation outside of stuff like northern european bogs/the dead sea, and they often just look like logs underwater, not boats)—at no point has Australia been fully connected to continental asia. Hell, this is true for H Erectus, let alone h s sapiens—it's not difficult to believe H Erectus might have pieced together how to lash logs together.

On articles like this, I strongly recommend just ignoring the title. It's enough to make anyone with a mild background in the subject frustrated. The research itself remains incredibly interesting.