From UFOs and the Limits of Science by Ronald D. Storey c. 1981 
     
    Reproduced for educational purposes only. 
     
    The Time Travel Theory 
     
    This  imaginative idea is based on the premise that man will advance to 
    such a high technological level in the next few hundred years that,  in 
    learning how to control certain forces of nature, it will be within his 
    ability  to manipulate the barriers of time and space and "return"   to 
    our  present time,  or any other he wishes.  It has to be admitted that 
    there  are  certain  astrophysical phenomena  currently  being  studied 
    (i.e.,  quasars, black holes),  which are not properly understood,  and 
    there  is  every indication that some fundamental natural processes  in 
    the  Universe have yet to be identified,  described,  and  incorporated 
    into our framework of knowledge. 
     
    Nevertheless, the only hints of a time travel basis for UFOs are in the 
    behavioral and mrphological description of occupants sometimes reported 
    to  pilot  them.  The behavioral component refers to reports that  such 
    occupants  generally  avoid  contact or at least do not  go  beyond  an 
    informal   communication  with  the  witness(es).   This   "policy   of 
    noninterference"   would  seem  to be more appropriate  for  a  scoiety 
    visiting  its  own past,  which ahs already "happened,"   than  for  an 
    interstellar-travelling  society,   which might be eager  to  establish 
    formal links with new civilizations. 
     
    The morphological component involves the biological feature of neoteny, 
    a  characteristic in which infantile features are retained in the adult 
    form. A neotenous trend is evident in the primates, particularly in man 
    (the  result is a longer childhood and the acquisition of knowledge and 
    values  by children),  and the trend will theoretically continue in the 
    future.   This implies that human adults at some future time could look 
    more like today's children.  Curiously,  UFO occupants are described as 
    small and childlike, with large heads relative to their bodies. Both of 
    these  speculative  forms  of evidence must rely,  of course,   on  the 
    authenticity and reliability of UFO reports involving "occupants." 
     
    The  possibility of UFO occupants being extraterrestial time  travelers 
    (i.e.,   not  from  our  future)  is not  generally  addressed  by  UFO 
    researchers.