Comparatives and Superlatives

-The Vatican is the smallest country in the world.
-The blue whale is the largest animal in the world.
-The cheetah is the fastest animal in the world.
-Everest is the highest mountain in the world.
-The Nile is the longest river in the world.
-Sahara is the largest desert in the world.
-Russia is the largest country in the world.
-The great wall of China is the longest wall in the world.
-Lake Victoria is the largest lake in Africa.
-Antarctica is the coldest place in the world.