We live in the materialistic world where all the things are mostly tangible and have a chemical or biological origin. Yet some phenomena can't be explained from scientific point of view yet but it's the question of the future. If our planet Earth is the result of long and gradual evolution process, thus we know what are pieces for sure. But what heaven stands for it's rather embarassing, it's something we can define as an intangible matter that no one have seen on Earth. Perhaps it exists in other dimensions somewhere in the sky surface.