i think the universe is like an expanding bubble and it will eventually expand to its limit then start to deflate and at the final point of deflation there will be a chemical reaction to start it all over again, we are one of trillions of universes just suspended there like bubbles in a pint pot, we are positioned in the habitable zone between the sun and other planets but that's only habitable to us and not other species so i think there are many planets out there occupied by some form of life, out of all the known planets it would be interesting to see whats under the ice of Europa as there are active thermal vents, just a shame its not in my lifetime