Dinosaurs lived in Mesozoic. Some of them were giant, wild and brutal, some were living in the water, and some were able to fly. They could have been the real models for dragons and monsters from myths, legends and fairy tales. But men are said to never have lived together with dinosaurs which extinct about 60 million years ago. There are some rock drawings in the Cosquer Cave in Southern France that look like renditions true to nature of dinosaurs. There are also two controversial collections: the collection from Dr. Javier Cabrera, Ica, Peru and the collection from Waldemar Julsrud, Acambaro, Mexico. Those collections of strange objects raising the question if dinosaurs and men lived together. The collection from Ica contains stones and figures made of clay that belong to Dr. Javier Cabrera. The motives show fabulous beings, unknown landscapes and regions, operations and many dinosaurs and other bizarre and monstrous creatures living together with men with big eyes. The exact place where the objects have been found is unknown. Scientists declared the collection fraud. The collection from Acambaro, Mexico, is detailed documented. First findings were made in 1944 by Waldemar Julsrud. Thousands of figures have been excavated near the city Acambaro and in the North West of Mexico City between 1944 and 1952. The collection is said to have contained more then 75.000 pieces, today there are about 33.000 pieces. There are foreign men and strange monstrous creatures. In 1954 an examination was made by the Instituto Nacional de Antropologia e Historia (National Institute of Anthropology and History of Mexico), head was Dr. Eduardo Noguera, historian. In a report it is stated that everything was done correct during the excavation. But offi cially archaeologists were critical. In 1968 there was an age dating made that resulted that the material has to be 6.500 years old. The Applied Science Centre of Archaeology of the museum of the University of Pennsylvania dated the same objects. The high age was confirmed: they dated the pieces to 2.400 to 2.700 b. C. This result was certified with 18 control measurements. Recent examinations showed that some of the figures are old and authentic and some of them are modern. This means that the collection contains ancient and modern pieces in a wild mixture.