To be human means to understand the concept of time. Not one living species is greater than the other, but the human race's ability to understand this concept enables us to evolve and develop on a much higher level than anyother species. A bird has been living in its nest ever since the human race has been living in caves. A bird lives for each day, while we are living for the future. We try to make this life span we invison for ourselves last us for as long as possible. We send rockets to space, we go to school and we create medicines because we know that we only have one life to live. Faith, religion and the idea of an after life are a huge part of being human. We want to believe that there is something else out there that will give us more time to keep on living.