Do you think that aliens exist, as if you don't, I will have to have a confused look on you then.
As of still, we haven't got a radio signal from the space yet, but that could be logically explained, i.e. ::
A) The signal sent is too weak
B) The closest exoplanet with intelligent life. is too far away
C) The aliens have a different kind of technology
Anyway, I don't think this planet has had any aliens here yet. Do you?
As of the latest technology to space-travel, - we are not good enough of it yet.
The ordinary rocket isn't enough to travel big leaps in the space.
We'd really need something more 'alienish' instead.
Maybe the new space-traveling technology sees a daylight, when the scientists start mimicking the blackholes as example??
NASA, ESA etc. would need to step out in the maximum level in this.
On the other hand, there's not such a big hurry though yet, as long as we take care of our own planet as much as needed.
But we are in the Mars already, so that's already a remarkable thing. Did you know that it takes 7-8 seconds to send a pic from Mars to earth?