Whoa!! I am impressed by Avik & Little_Sticks! They, I feel, are both correct in what they are saying.
Honestly, yes, things are always going to move & change from the way we know them now. EVERYTHING. So, what is a human anyway? What we define them as? Sure, they will change. Will they go extinct? Maybe. Depends on what happens to the "earth." However, we are all part of everything. We are all made of the same, and interconnected. It is the only logical conclusion. Space is infinite, and our galaxy has other objects/particles/whatever you wanna call it pushing against it in space making it what it is. Waves in space form what we see & call our universe. We don't technically even "see" what happens when someone "dies." We no longer can communicate with people whom die in the way we always have, and so in our little brains we assume they are no longer there. However, they only changed form. The only thing that "kills" matter is anti-matter, right?
So, maybe I am in over my head saying all of this...
I can't always describe what I am trying to say...BUT! I found these people who can! Sorry, but this website is orgasmic to anyone interested in the truth of things. It is WWW.SPACEANDMOTION.COM.
Here's a little tidbit:
"In fact it is possible for a finite spherical Universe to form within an infinite Space. Unfortunately for Einstein, he incorrectly imagined a 'curved space' such that if you traveled far enough you would return to your starting point (a very abstract and confusing concept).
The solution is far more simple, and is found instead from Huygens' Principle. Three hundred years ago Christiaan Huygens, a Dutch mathematician, found that if a surface containing many separate wave sources was examined at a distance, the combined separate waves of the sources appeared as a single wave front with the shape of the surface. This wave front is termed a 'Huygens Combination' of the separate waves.
Thus the out waves of all the other matter around us within our Hubble sphere must necessarily form our spherical in waves. This unites finite matter with infinite space due to this sharing of waves."