The fact of the matter is science will never be complete, so long as the Earth continues to exist. Most of the members of the scientific community will spend the remainder of their lives discovering the majesty of human evolution and the aging of the Earth, and still not come close to mapping it all out.
Just try and imagine the complexity of an ecosystem such as ours, with the capacity to sustain life and propogate species intelligent enough to bring us to our level of present sophistication. These things cannot be explained in a series of books with some choice phrases and parables.
Ultimately human beings reach an end. You know it as you have seen and heard of people reaching their own demise. It is common knowledge, all people learn at some point in life that, just like the people before them, and before them, that life will end.
Naturally all species are scared of things that they cannot explain, and aim to discover the reality of what these things are. In the more primitive times of which the bible was written, people would be subject to that same fear. What happens to us when we die? How can we communicate with each other? How do the organs inside us function? Unfortunately, scientific technology was nonexistent in these times and so they resorted to what so many other civilizations did before them: Created a God theory.
The God theory was their attempt to explain the reasoning for life. They had no idea about the scientific workings of the world around us, and so they assumed that life must have been created by a supreme being, perhaps an Alpha male being, such as the traditional God we know today.
However the rise of scientific technology over past centuries has explained many of the questions people sought to explain thousands of years ago.
What happens when we die? When the brain and nervous system shuts down, the heart and lungs cease to function. We are no longer able see, to move or to communicate and our body becomes a cadaver. That's it.
How can we communicate with each other? Like most species, our ability to communicate complex thoughts with other humans like ourselves is a byproduct of millions of years of evolution. It begins in the era of the Neanderthal, with a string of body language and grunting and evolves over time into the formation of universally accepted audibles, such as laughter and crying.
How do our organs function? Just grab a high school Biology textbook.
Religion remains a staple of modern life because it is a system of routine, and because people today share the same fear they shared thousands of years ago.
All I am saying is that science has disproven the afterlife. It is scientifically impossible for you to live on in some form or another after you die. Its impossible. There are thousands of pages of research to prove this. Research Darwinism and Natural Selection, or the ever-expansive library of human biology.
Religious organizations state, without any evidence to substantiate their claims, that their is a superior being, who watches everything that every human being on the planet does, and judges them accordingly when their time comes. If you follow the man-made doctrines and conventions put forth in the Supreme Beings' handbook (worship him, spread his message, give offerings to him) when your body no longer functions you will float up to paradise, with all your relatives and friends who died before you. You will be happy and live forever in bliss. However, if you do what you want and do not worship, evangelize, and give you will descend into a fiery pit where you will live in agony and sadness for all eternity.
All religions use this metaphor in one way or another, some in more extreme circumstances than others. Obey and Worship in this life for reward in your second, more luxurious life. Live life for yourself and spend forever burning and suffering in a lake of fire.
Alternatively I propose you spend some time familiarizing yourself with the beauty that await you in this life. If you want some examples of how amazing and complex nature is, take a look at the BBCs' documentary series Planet Earth.