Huts they made then, and fire, and skins for clothing, And a woman yielded to one man in wedlock... ... Common, to see the offspring they had made; The human race began to mellow then. Because of fire their shivering forms no longer Could bear the cold beneath the covering sky.
LucretiusNo single thing abides; but all things flow. Fragment to fragment clings - the things thus grow Until we know them and name them. By degrees They melt, and are no more the things we know.
Lucretius