Nepal is one of the biggest natural museum in the world. It is one of the richest countries in terms of biodiversity due to its unique geographical position and latitudinal variation. The elevation of the country ranges from near sea level to the highest point on earth, Mt. Everest, all within a distance of 150 km with climatic conditions ranging from sub-tropical to arctic. This vast variation fosters an incredible variety of eco-system, the greatest mountain range on earth, thick tropical jungles teaming with a wealth of wildlife, thundering rivers, forested hills and frozen valleys.