the world.
No one person achieved this. The continents separated themselves (and still move today); it's plate tectonics.
All the continents used to be a part of one land mass and separated. This supercontinent was Pangea.
It means the empire's land is adjacent to one another, meaning they are connected and not separated by water or another empire's territory. In some major empires like the Persian empire, their land was separated and spanned 3 continents.
There are some same species of both plants and animals located on separated continents. This is because the continents were all at one point joined together in one super continent: Pangea, but separated some 200 million years ago. fossils
Continental drift.
which two continents are separated by the Ural mountain range
Of course you can! On the map, they show us that Europe and Asia are together, so it's possible. I did that once.
oceanic spreading ridges
No, Pangaea separated into two main supercontinents called Laurasia and Gondwana. These two supercontinents eventually broke apart to form the continents we have today.
Asia and Europe are part of one huge land mass separated by the Ural Mountains.
Animals
America and Europe