looking at the map you posted there is no land bridge between australia and mainland asia, check your map again..
Reading comprehension:
It’s a thing.
So, for the record, if you follow what is OBVIOUSLY a finger of land on that map, a point is reached which is almost exactly the same distance between Cuba and Florida NOT bridged by that finger of land (i.e., “almost”; smh) to reach what is now Australia across a narrower gap, ironically at almost exactly the point the map frames as the beginning of the human journey across the continent.
Think hard about that.