The voyager travelling had suggested we human kind cannot escape from this solar system, without a new revolution of travelling method.

Most observed planetory/stars system is light years away. So human kind has no such kind of "life-time" able to travel or even received the signal from orbitor even the they can reach so far. As it may takes hundred and thousand of light years for the signal to travel back and forth.

I don't think we can get this kind of news, the travel distance or reach is simply too short in term of universe to meet one.

If not mistaken, there is some evidence sent back that suggested Titan has big hydrocarbon ocean. Titan or Titan2 or another moon nearby, which is which, forget already.

But there is no evidence about micro-organism.

Why people always believe Aliens must crash landing to earth, when we found it, or only we can find it?
They cannot come here, and waving their hand to us?
They cannot send probe just like we human kind send voyager to Titan?
They must land in US, so that secret can be kept?

What is the odd chance of alien spaceship landed in US alone, and not other countries so that secret can be kept by US gov/NASA?

Aliens can a worm type living underneath of Titan ocean, Aliens also can be microscopic organism that living underground. Aliens can also have 8 eyes so that can easily see all the dimension, up down, back, and forth without turning the head.
I had difficulty believe Alien is the same type/structure of human kind, as what many speculate.

Maybe announce that we human kind actually is Aliens. Remember there is no human kind before the dinasour ages, so we could be the Aliens concur this earth.