Change has its own energy within us. When we hear things we can't conceive often it leaves a little tic-tic of fear because, though we can't conceive of the idea, we must settle it within ourselves by imagining it in terms we can relate to. What? Let me explain.
Every time a scientist shouts that they have the answer to some question six others come up with something different, and the rest of us are left to try and relate to any of the answers they've arrived at. Often all of their answers feel like something we should fear.
For instance; How will the our universe end and how will that happen? Will it just keep going forever? Will it collapse? Will it bend over on itself and become something entirely different? Your guess is probably as good as the conjectures of science.
I can't even get my mind around the size of the universe let alone how it will age. I remember once concentrating on trying to conceive of a space with no edge. It never stops. It is not contained in any fashion and goes on forever (our universe). It made me dizzy! The human mind, of this time and of this place, understands that all things are contained no matter how large or small. Anything that bucks that reality... tic-tic...
The scientists talk of the end of the universe over a time span exceeding our ability to count. It's as far away as the edge of the universe (an edge that does not exist). But in the absence of numbers I can conceive, suddenly all things feel more eminent. "What? The universe is going to end? How do you know it's that far away? What if it's next year? Or maybe even next week?! Oh-my-GOSH!" (tic-tic)
These little tics caused by things we cannot conceive play a part in what we do and how we treat the people and the world around us. Some choose to live with greater abandon, while others will pull up the rug and bar the door. Most of us know that we cannot know what tomorrow will bring; the scientists are merely adding to the information we have to validate our certainty.