Newly opened|Prague's National Museum has opened a third permanent exhibition to visitors. Windows on Prehistory is the largest exposition dedicated to the prehistoric ages in the Czech Republic with 2,000 original exhibits, models, and interactive elements collectively representing a journey through the Paleozoic seas and swamps, below sea level of the Mesolithic Sea. Learn the story of the only Czech dinosaur, plus, from the ice age, see a life-size mammoth model, and a saber-toothed tiger.