I'm also on the view that the world when end because our sun will no longer be able to do it's job. It's a star, and it too has a life-cycle like all the other stars in the universe. Of course, we don't have to worry about it happening in our lifetime, but future generations (waaaaaay down the line) will be faced with this crisis, if humanity lasts that long.

I really don't want future generations of people to have to deal with a dying sun. I think that would be one of the worst things to have to deal with, since there would be nothing you could do about it. Well, unless there was another planet somewhere out in this great universe of ours that was capable of sustaining life, and they somehow are able to reach it. If that did happen, I'm pretty sure there would still be people that would be left behind. Kind of sad to think about really.

As for what I think will destroy humanity, I saw a documentary about it once. I think the first one was a super virus that was mutated to where it was near impossible to find a cure. I think the example was a mutated ebola virus. The scenario was that some scientist created it for use for germ-warfare, and it got into the wrong hands and was used to wipe out large numbers of people, but got out of control.

Another one I remember was that a big asteroid would hit the earth, and would corrupt the atmosphere so bad that it would be toxic to us and unable to support life. Just out of my curiosity, I looked up some statistics to see how likely that would be. Here's what I got:

And the chance of that happening is, from historical comparison, 0.001% or less.
Haha... Hopefully, that number stays that small.

Did I just get off-track with all that? Sometimes, I get rather chatty.