Just possible simply say that Mother Nature is able to create them. Mathematical-physical computer modeling can be postponed to any time in the future, as well as of theoretical preliminary designs and ideas of any physical models. Mother Nature is very simply able to create them all by itself even without help of any silly extraterrestrials.
Nzuri mifumo ya fuwele za barafu kwenye kioo, kama vile yoyote muundo kioo, mama Hali pia inajenga kabisa na yake mwenyewe, bila msaada wowote wa extraterrestrials yoyote ridiculous na idiotic. Tu inawezekana tu kuangalia.