yawn...you're spinning madly but its not working
for over 200 years we haven't discovered sentient life outside of this planet, it is thus a scientific fact no sentient life exists outside this planet....
just admit you made dumbass statement and move on
Jesus, I can't waste my time anymore dumbing myself down to your level. So listen up, this is the last response. I don't play these games of going around in circles for 50 posts.
Yurt, this isn't Star Trek. No one's ever been to another solar system, and no one's captured a UFO, so the hypothsis that there is sentient life in other solar systems is largely untestable. Other that a few radio telescopes at SETI, there isn't any scientific methods to prove the existence of sentient life. Listen bro, there's no fleet of Star Ships out there hunting for life. So your premise that science has been looking for sentient life for 200 years is preposterous. The presence of life is almost completely untestable, until we either capture a UFO, send a probe to another solar system, or if SETI ever picks anything up. There's nothing even remotely equivalent between the body of work and robustness of data in the palentological field, and the star trek shit you're talking about.
The only premise that has been floated, is that it is reasonable to speculate hypothetically that life exists elsewhere in the universe, because our experience is that carbon based life can thrive where ever there is water, and where ever temperature and ambient climatic conditions are in the sweet spot.
Carry on with your Flintstones crap.