World – the way you see it?
The common map is plot with perspective of the northern hemisphere. However, there is no absolute direction between north and south. So these two are totally same:
How birds migrate in an upside-down world? The same.
The common map is plot with perspective of the northern hemisphere. However, there is no absolute direction between north and south. So these two are totally same:
How birds migrate in an upside-down world? The same.