No single author (each is a product of the oral tradition)Written down after centuries of oral transmissionSecondary Epic A single, gifted poet such as Virgil or Milton composes a work that imitates a folk epic. The Æneid and Paradise Lost, for example, involved considerable research and have the style of earlier epics (particularly in setting, dignified speeches, and extended similes.
According to the Big bang theory, Earth was among the explosion. But, a great amount of water came on earth and made it possible for plant to grow and life to happen.
After centuries and centuries, this was no big deal