The earth is a huge ball covered with water, rocks, soil, and it is surrounded by air. Throughout advances in science, geologists have learned more and more about the earth and have been able to unravel mysteries and expand our knowledge of our planet. Where did the earth come from? How was it formed? What is ? In this paper, we will look at some of the theories and methods used to estimate the approximate age of the earth. Although, there are no solid evidences available, scientists have been able to estimate the age of rocks by studying the ....