The Universe is really big

For all we know, there are life forms out there that have evolved to live perfectly fine on planets that we wouldn't even be able to go near. We don't know any life forms on our plane that can survive that, but there can be unknown creatures out there with bodies capable of withstanding temperatures as hot as the sun. Their bodies being stronger than any material known to man.

The question isn't whether or not there is life out there; bacteria count as life. The question is whether there is intelligent (human-level being the lowest possible value) life.

As for worm holes, I'm pretty sure they're impossible with our current understanding of physics.