Audio File   Civilized society is the result of man’s early efforts to overcome his dislike of isolation. But this does not necessarily signify mutual affection, and the present turbulent state of certain primitive groups [More]
Audio File   The great event of this glacial period was the evolution of primitive man. Slightly to the west of India, on land now under water and among the offspring of Asiatic migrants of [More]
Audio File   It is impossible accurately to determine, simultaneously, the exact location and the velocity of a moving object; any attempt at measurement of either inevitably involves change in the other.  The same sort [More]