Life Developed Only on Earth Essay Example for Free

Life Developed Only on Earth Essay Life developed only on this one small planet in this one small galaxy. There are several reasons to explain this and some of these are the following: First of all, water is sufficient on Earth making it fit for life to exist (BBC, n. d. ). Second, oxygen is available on Earth for a life to carry on living (BBC, n. d. ). Third, neither earth is too close nor too far from the Sun, thus neither it is not too warm nor is it too cold to live in (BBC, n. d. ). Fourth, the chemicals necessitated to create a living cell are more than enough (BBC, n. d. ). Fifth, a considerable amount of plant and animal species have already developed and adjusted to the environment (BBC, n. d. ). Sixth, the surface of the Earth is perfectly designed since it amazingly protects it from the rays of the Sun (BBC, n. d. ). This is the same reason why the Earth gets the right temperature while other planets are either extremely hot or excessively cold (BBC, n. d. ). Consequently, this also made it possible for water to be available in its liquid state (BBC, n. d. ). Seventh, even if it has been said that life exists in Mars, there are no evidences that support such yet (Fisher, 2005). Furthermore, telescopes are not that good enough to provide details as to whether life really exists there or not (Fisher, 2005). Moreover, to declare such a statement would entail a closer scrutiny of the aforementioned (Fisher, 2005). Eighth, unfortunately, nobody from Earth can leave for Mars (Fisher, 2005). In fact, even NASA say â€Å"no such mission will be attempted for several years† (Fisher, 2005). Last but not least, the Earth is the only planet which has a magnetic field that â€Å"turns away dangerous particles of space radiation† (Fisher, 2005). This means that other planets have a much lesser air and have a much colder temperature, thus living will be quite impossible (Fisher, 2005). References BBC. (n. d. ). Why is There Life on Earth? Retrieved August 22, 2007 from http://www. open2. net/science/finalfrontier/life/why. htm Fisher, D. (2005). Is there Life on Mars. Retrieved August 22, 2007 from http://spaceplace. nasa. gov/en/kids/phonedrmarc/2002_june. shtml