The ice ages are discussed and reasons for mammalian distribution and appearance in the upper portion of the geological column are presented. The evolution of man and the time constraints in terms of recolonization of the post flood Earth are also discussed. 氷河期は、説明、哺乳類の分布と地質の列の上部で外観の理由が表示されます。男と根面の滑沢ポスト洪水地球の面で時間の制約の進化についても説明します。