Re: Space exploration - criminal waste of money
Go back and read the opening line of the article you linked to. It said "other solar systems". Our own solar system is colonisable, it's just down to the will, the technology and the funding. Leaving our solar system would require either technology that does not exist or have any current real hope of existing, or generation ships that would have to somehow travel vast distances weighing an enormous amount and be self sufficient - both for resources and societally for a thousand years. The other option is the cryogenic suspension of humans, but that would also require technology way beyond what we can currently imagine - and the ship would still need to be entirely self-sufficient with no maintenance required.