I think it's more of a when than a how question. As long as an asteroid doesn't come and wipe us all out before we master planetary space travel, I think it's p

I think it's more of a when than a how question. As long as an asteroid doesn't come and wipe us all out before we master planetary space travel, I think it's pretty safe to say at some point we will encounter alien life. With all the planets that exist...too much potential for their not to be.