Pygmy Jerboa is among the list of those mammals that are smallest known in the world. It is nearly 47mm, or around one inch long mammal. This kind of mammal is found only in China and Central Asia but most of the all it lives in the area of Kazakhastan. The government has printed its photo on their postal stamps! It is believed that its size reduction is just because of the separating from that rodent family. It is the smallest creature in the world today.