<prompt> tafadhali geuza maudhui haya ya swahili kwenda kwa kiingereza.ingawa sayansi inajua ndoto ni nini, bado haijulikani ni kwanini tunaota, ingawa nadharia nyingi zipo.  <response>: although experts have figured out what dreams are, it is still not known precisely why, although plenty of theories exist. 