hi friends can you give me a speech on the topic"life is possible on other planets"
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Many people make a distinction between the origin of life and the evolution of life. In this view, biological evolution refers to the gradual development of the diversity of living things from a common ancestor, while the ultimate origin of life is a separate question.
This is a legitimate point, but evolution is about much more than just biology. The evolutionary worldview is that all of physical existence, both living and non-living, arose through purely natural processes. With this broad definition of evolution, abiogenesis--the spontaneous appearance of life from non-living matter--is a necessity. If life did arise on earth by itself, it would be inconceivable that this is the only planet upon which there is life. Otherwise, the earth would be a remarkably special place, and that could easily lead to theistic ideas. Consequently, most evolutionists believe that life must exist elsewhere in the universe.
A Powerful Test
The creation worldview is very different, because, as usual, we start with very different assumptions. We believe that life exists on earth because God created life here, but He first had to fashion the earth to be a suitable habitation for life. The evolutionist must believe that life is inevitable wherever conditions are suitable for life, but creationists understand that even if conditions on another planet could sustain life, life there is not possible--unless God created life there or permitted life somehow to travel to that planet from earth.
While we cannot prove biblically that God did not create life elsewhere, the strong implication of Scripture is that He did not. These very different predictions of the special creation and evolution models mean that the search for life elsewhere amounts to a powerful test between the two theories of origin.
Looking for Life on Mars
In recent years, there has been much discussion in astronomy circles over the search for extraterrestrial life, so much so that a new term has been coined for this study: astrobiology. Since there is yet no evidence that life exists elsewhere, astrobiology is a science for which there is no data, or at least no data in support of the science.
Since there is no support for the contention that life exists elsewhere, much attention has been diverted to searching for planetary conditions favorable for life. Mars has been the focus of this attention for a very long time. Mars is about half the size of the earth, and it has at least a thin atmosphere. Water exists on Mars, though likely not in abundance, and what water it does possess is in vapor or solid form. The temperature and atmospheric pressure on Mars are far too low to sustain liquid water.
The Viking craft that landed on the surface of Mars in 1976 contained three very robust experiments to detect signs of life. Two of the experiments showed no evidence of living organisms; the third experiment had weak but ambiguous data. Even the most optimistic searchers for extraterrestrial life agree that these slightly positive indications probably were the result of inorganic chemical reactions in the soil. Besides the bitter cold and sparseness of water, there are other impediments to life on Mars today. For instance, the thin Martian atmosphere provides no protection to solar ultraviolet radiation, which is lethal to living things. With these problems, interest in life on Mars has waned, though some hope is still held and many think that life may have existed on Mars in the past.
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