You know of course that a mathematical line, a line of thickness nil, has no real existence.

This means nil.

The Nile is the vital artery of Egypt.

Some experts believe Fiona is the smallest hippo ever to survive. She weighed only 13 kilograms at birth. That is one-third the size of a normal, fully developed baby Nile hippopotamus.

Can the Nile be diverted to Israel?" "Mubarak has already done that."

The Nile is the longest river in the world.

The periodic flooding of the Nile is very important to Egypt.

We associate Egypt with the Nile.

Yanni started his journey down the Nile.

The first cases of West Nile virus appeared in the United States in 1999.