Hadean
The Hadean () is a geologic eon of the Earth pre-dating the Archean. It began with the formation of the Earth about 4.6 billion years ago and ended, as defined by the ICS, 4 billion years ago. , the ICS describes its status as ""informal"". Geologist Preston Cloud coined the term in 1972, originally to label the period before the earliest-known rocks on Earth. W. Brian Harland later coined an almost synonymous term, the "Priscoan period", from "priscus", the Latin word for "ancient". Other, older texts simply refer to the eon as the Pre-Archean.
Athena (Saint Seiya)
Masami Kurumada revealed in volume 1 of "Saint Seiya" that Athena had battled in the age of myth against the Giants, Ares and Poseidon, each in incarnations centuries apart. He also revealed later that she has battled Hades in the age of myth, then in the fifteenth century, eighteenth century and finally in the twentieth century. She battled Poseidon in the twentieth century, 2000 years after their battle in the region of Attica.