There are many who state that crystal skulls have healing properties, transmit energy, have the ability to convey information or are repositories of ancient wisdom like a Universal library. The power of crystal skulls seems to be amplified in the presence of other crystal skulls (perhaps "the more the merrier"), although the actual numbers vary from legend to legend. Most popular legends speak of 13 crystal skulls coming together to bring about profound transformation on Earth. Some legends and theories state that the original crystal skulls were not created by the hands of man at all, but may be of extraterrestrial origin. Some say that they may be the crystallized consciousness of advanced beings related to Atlantis, the Pleiades, or beyond.