I always struggle with this question as well. A part of me wants to believe that death cannot and should not be the end. It is kind of unfair in a way that there is only a limited scope of things we are able to do in life, while the majority of the universe is out there, just waiting to be explored.
But then, another part tells me that perhaps, it is the end and life happens just by chance! I guess we will never know, or one day we might!!