I think that it's a little bit of human arrogance that makes us believe that we're the only life in the universe and that there's no way life from another system could get here.
A little over 100 years ago, people would have looked at you like you were crazy if you said you could fly. Now look at the size of the craft and we've even broken the sound barrier. (Another thing that many believed we would never do!)
A little over 50 years ago, people would have looked at you like you were crazy if you said we would have a man on the moon. Flying a craft into space, docking with a space station and safely returning the craft to Earth was unheard of.
The Earth is what, 4-5 billion years old? And we've only really truly evolved with technology in the last 3-5 thousand years?
People assume that if there is life elsewhere in the universe, that life must be on the same time line as us. Therefore, if we can't do it, it's impossible for any other race to do it. (Traveling light speed?) Why don't we hear them? What if they transmit with a different type of signal? Or in a different wavelength all together? Or with a different medium? We're not listening for the right thing with the right equipment. There are certain pitches that dogs can hear that we humans cannot. Does that mean that there is no signal?
We are a very skeptical race and require that you "show me" before I believe.
A little over 100 years ago, people would have looked at you like you were crazy if you said you could fly. Now look at the size of the craft and we've even broken the sound barrier. (Another thing that many believed we would never do!)
A little over 50 years ago, people would have looked at you like you were crazy if you said we would have a man on the moon. Flying a craft into space, docking with a space station and safely returning the craft to Earth was unheard of.
The Earth is what, 4-5 billion years old? And we've only really truly evolved with technology in the last 3-5 thousand years?
People assume that if there is life elsewhere in the universe, that life must be on the same time line as us. Therefore, if we can't do it, it's impossible for any other race to do it. (Traveling light speed?) Why don't we hear them? What if they transmit with a different type of signal? Or in a different wavelength all together? Or with a different medium? We're not listening for the right thing with the right equipment. There are certain pitches that dogs can hear that we humans cannot. Does that mean that there is no signal?
We are a very skeptical race and require that you "show me" before I believe.