Yeah, the sun will eventually become a white dwarve. But if the energy it holds ever goes unstable, the sun's remaining energy may become dark matter, and you know what that leads to:

A BLACK HOLE

If the sun doesn't become a black hole it'll explode, which will leave behind enormous fields of powerful energy and dust. After that, slowly after a few billion years, the dust and energy will slowly form back together, thus forming another sun. <This is I think, all based on scientific studies, not theories. But human existance will probably cease by than anyway. But when the sun weakens, I think we may slowly go into another "Ice Age" and then after that, the sun's gravitational fields will weaken, causing us to drift out of our orbit into deep black space. But I'm thinking that the coldness isn't what kills us, but the high speeds that will cause our atmosphere to simply blow off the Earth's surface, leaving us with the most powerfullest wind storms and no breathable oxygen.
I was under the impression that it would take a sun 100 X the size of our own to summon the force capable of creating a black hole. This is what I was taught (please tell me if anything Im saying is incorrect, Im completely open to criticism), suns such as our (size), that use all their energy go through a stage of dieing where they expand (red wolf), the sun will expand to the point where it takes the orbits of mercury, venus and earth with it.

Suns about 10 X the size that start to die go may become a super nova and ultimately a pulsar (very fast spinning mass which magnifies weight to the point in which a feather would weigh a tonne, due to gravity).

And of course there are the super suns (100 X the size of our own) that have such a massive weight, when they collapse the energy is great enough to create a black hole. Apparently, scientists believe there are a few renegade black holes larger than anything we could even begin top comprehend getting around swallowing up entire galaxies, moving at speeds almost as fast as light.

Anyway, to the question at hand, I believe we still have a lot to learn and that there are a lot of things we arnt considering (involving our universe), we as humans have intelligence but Im sure there are boundaries as to what we can learn. Im sure there are things we cant see or comprehend that. As far as we know there could be forms of life from other planets flowing right through us, evolution (apparently) has made us the way we are so whats to stop another planet having some form of life that isnt what we interpret as physical. oops steered off a bit lol
Anyway, there are limitless possibilities to what is actually going on with our universe as a whole, we could all be way off but the universe isnt static and continually moving and changing so it wont be like this forever...