The origin of life on the earth has been a fascinating topic of research for philosophers and biologists as well. Several ancient philosophers propagated their own theories of the origin of life, and the Adam and Eve theory was one of them.
In order to find a scientific answer to the question, palaeontologists studied many fossils of the prehistoric age. Now, scientists have discarded all the religious theories; these merely have historical importance. Today, the biochemical origin of life known as the Oparin-Haldane theory is widely accepted, since scientists have enough evidence to prove it.
They have established that the human race evolved from Homo erectus, a creature more or less similar to the great apes. The human race came into being between 400,000 and 200,000 years ago. At that time, people lived as nomads or wanderers in groups or bands of fifty to a hundred members and often used fire and stone tools. They had not yet begun cultivating crops and depended largely upon hunting quarry and gathering wild vegetables for their survival. They had not yet learnt language, clothing, morals or religion.