Beginning of Essay
"Of animal ancestry, man moved ahead as a steward of other creations in taming the environment as they struggle to survive." There are many theories about the origin of life on earth. Many opposing theories and questions have been raised. For example, the Biblical ....

Middle of Essay
.... and biological make-up to these changes to meet their needs. The story of man's evolution is one of increasing differentiation from the other groups of animals to which he is related. It is believed that over 60 million years, descendants of the early primates gradually evolved to produce modern man. Tree-living creatures, more like rats than men, were followed by the ancestors of today's lemurs and monkeys, and by a primate called Dryopithecus, believed to be the common ancestor of both apes and man. A breakthrough in man's evolution came when creatures became adapted to standing and walking in an upright position, freeing their hands for other ....