Thanks Dan,
I don't have proof but if you think nothing can travel faster than light [670, 616, 629 mph] it would take 4.5 years to get to our closest star in Alpha centauri.
Our fastest object is going to Pluto now at 50,000MPH and it will take another 10 years.
Nothing has been discovered that can support life at the extremes.
If life out there can build a ship to travel at the speed of light then they have already been here or cant be bothered because the Earth is a spec of cosmic dust in the vast universe.
The largest object known is the same diameter and circumference as the orbit of Mars around the Sun.
That is big.
We cant see it with big telescopes but when it goes Supernova We will know about it!!
Time travel is not going to happen in the future because if it was why have they not been back yet?
We cant even get to Mars yet!
Yes there is life out there, I have no doubt, but to evolve like we have, no, we where lucky to get this far that is because our planet has been stable for a long time, That is changing even now.
I don't think we will get out of our solar system before our Sun engulfs our Earth.