The meaning of life constitutes a philosophical question concerning the purpose and significance of human existence. The concept can be expressed through a variety of related questions, such as Why are we here?, What's life all about? and What is the meaning of it all?. It has been the subject of much philosophical, scientific, and theological speculation throughout history and there have been a large number of answers from many different cultural and ideological backgrounds. (Wikipedia)

Some say that the answer is 42.