The smallest bird in the world is a bird called Humming Bird, which are found only in North and South Americas. They can fly backwards, and are the only group of birds able to do so. Their English name derives from the characteristic hum made by their wings. Males of the bee hummingbird living on Cuba and on Isla de la Juventud, weigh 1,6g, and their length is 5,7cm, Half of length make a tail and... 

Vatican is the smallest country in the world. It’s basically a walled enclave inside of Rome, Italy. The population of Vatican is about 800 people, and the whole territory is only 0.2 square miles. This country is so small that it doesn’t even have a street address. Although it is so small, but is the spiritual center of the Roman Catholic Church. The Vatican City came into existence in 1929...