Abstract: One of the challenges facing scientists of today is how to unravel the mystery surrounding the origin of man, earth and the observable universe. It has taken them to the depth of the oceans, the earth’s interior, the moon and other planets, proposal to visit the nearest stellar neighbor and explorations to the deepest parts of the universe. These challenges are as old as the primordial history of mankind himself and has continued to generate controversies among ordinary laymen, spiritualists, religious leaders and ever-increasing number of scientists world wide. This study describes salient aspects of the earth the solar system and galactic history. It explores the possibility of existence of life in other parts of the observable universe. The description is based on evidences from scientific discoveries, space probes, spiritual explanations, the spate of Unidentified Flying Objects (UFOs), the search for Extraterrestrial Intelligence (Project SETI), the possibility of Intelligent Design of the Universe (IDU) and the present state of earth man’s knowledge and technology. The result of all explanations however showed that there is presently absence of evidence of life elsewhere in the universe. Though, man has not been able to establish whether there is evidence of absence of life elsewhere in the universe also. This is because man can still not predict clearly what could happen in future as man’s knowledge and technology continues to increase.