However, most scientists don't believe these stories. They think the skulls are more modern. Scientists have found marks on this, scientists are certain the skulls are not thousands if years old. Instead, they think the skulls are from the 19th century. Scientists also point to the British Museun's excavations. The museum's archeologists have found many Mesoamerican objects, but they have never found a crystal skull. Scientists say this is more evidence to show they are fakes, and not really Mesoamerican. Until we know more about the skulls, the mystery-and the debate-will keep going.