He is interested in the history of the Old World.

This world line connects time and space.

The one-eyed goblin was dancing in the forest.

I am planning to go to Inner Mongolia, an autonomous region of China, next week.

I have been to Outer Mongolia.

I have been to Chicago.

The Paleogene period was a very important time in the history of the Earth.

She is conducting research on the world's oldest profession.

Old World monkeys primarily inhabit Africa and Asia.

The World Trade Organization is an important organization that sets the rules for international trade.