https://kirjabloggaus.blogspot.com/ Kimmo Huosionmaa Some people think that "magical crystals" allows us to see the past, and there are two or three possible things, how crystals would do that. First is the psychological way, and there the crystals suggest the person concentrate the memory, or that thing gives the person dare to tell things, what that person doesn't want to tell before that. Or concentration allows making the connections to neurons, that the images can return to the mind or knowledge. Sometimes people have thought that the electricity, what is stored in the giant crystals makes magnet fields, what would make the electric signals, what travel in the nervous system stronger, and that brings them to our concentration. But there are other theories, and one of them is connected with the symmetrical crystal balls. The tale that the "Thunder god" gave human the crystal, what allows to see the future or the past could be possible in theory. In th