According the Greek story of creation, at first there was nothing but Chaos. Chaos was a huge, wild, disorganized void or "nothingness." Chaos had two children: Nyx and Erebus. Nyx and Erebus were not gods to be worshipped; they were personifications of the concepts of night (Nyx) and darkness (Erebus).
When would you expect to see a nocturnal animal?
during a rainstorm