@Butrflynet,
												......challenced  by  environments obstacles ??????
Where  do  obstacles  be  which  would  lead  to  disadvantages on  earth?
The  drive to  go  to  the  moon has abated   and  it  was  for  nothing.  The ensuing  researches (last  50
 years )  didn't led  to  anything and  further 50 years it  won't.
No  sickness has  be  cured  by  space  developements and  more  about  next.
....Aliens  environments.?????
 Aliens  are  very  smart  to  hid  themself  ,   if  exist . And  they  laugh  about  our  hunt  for since 50  years ,  if  they  exist.
Or they   don't  exist  and  we  won"t  find any  the  next  100  years. As  we  didn't  found  the  last  50  years. The  common  sense  dictates  that.
How old  are  you ?????
How long  do one"s   keep  up  to  beleave  that??????
Crop  circles  do  make  human  at   night  to  make  beleave  us  Aliens  did  made  .
On  Internet  you  can  get  intructions  to  create  crop  circles .  I  made  one  do.  If  you ever  see  a  crop  circle  ,  it  might  be  made  by  me  or other  persons.
.......Scientists!  
How  often  have  had  they  correct  their  theories ?
A  single-celled organismn  of  bacterium  can't  mutated  to  multi-cellular  organismn  of  human  from  ocean.  
Monkeys  are  our  forebears ?????!!!!!!  How  funny   ,  because  they  can,  t  donate  blood  nor  organs  to  us.
Pigs  do  donate organ  to  us ,  because  that  are  very  simular  to  humans.
How  I  said  on  my  thread with  Myth.....catholics ....Evolution....Chtistmas ...
Do  keep  in  mind  the  human  made  crop  circles. Only  nutty ,  kook  one's  denies  that !