In 2003, the Natural History Museum, which located next to the Science Museum, opened to the public. With the exhibition space of 3,000 square meter area, it displays knowledge about the evolution of life, the diversity of living creatures ranging from single cell organisms to species in the Kingdom, specimen preservation, taxidermy exhibition as well as research and collection. The Natural History Museum serves as the country’s center of reference for taxonomy, taxidermy exhibits and workshop, research and collection on biodiversity and nature. It displays knowledge about the evolution of life and the diversity of living creatures ranging from single cell organisms to the species in the Kingdom. Life-sized models of all kinds of plants and animals are displayed in a 3,000 square meter exhibition area. The exhibition zone consisting of 1,000 square meters. The temporary exhibitions and Boonsong Lekagul, M.D.’s exhibition zone consist of approximately 400 square meters. The total area is 1,400 square meters. The 4 major themes are exhibited including: Zone 1: The Origin of the Earth Zone 2: The Origin of life Zone 3: Evolution of Life Zone 4: Biodiversity