Olde Time Rhinos used to stroll over to Doggerland whenever We liked, for lots of thousands of years. Why not? Back then much of the water became ice, consequently lowering the sea level. Off and on for 100 thousand years.
And then things changed, the ice began to melt, and everyone had to decide where to go, one way or another. Pretty impressive alterations in the real estate.
Rhinos are used to these Natural Developments. They keep Us on our toes.