Cryptic (geology)
The Cryptic era is an informal term for the earliest geologic evolution of the Earth and Moon. It is the oldest (informal) era of the Hadean eon, and it is commonly accepted to have begun close to 4533 million (about 4.533 billion) years ago when the Earth and Moon formed. No samples exist to date the transition between the Cryptic era and the following Basin Groups era for the Moon (see also Pre-Nectarian), though sometimes it is stated that this era ended 4150 million years ago for one or both of these bodies. Neither this time period, nor any other Hadean subdivision, has been officially recognized by the International Commission on Stratigraphy.
Jewish diaspora
After the Persian conquest of Babylon in 539 BCE Judah (Hebrew: יְהוּדָה Yehuda) became a province of the Persian empire. This status continued into the following Hellenistic period, when Yehud became a disputed province of Ptolemaic Egypt and Seleucid Syria. In the early part of the 2nd century BCE, a revolt against the Seleucids led to the establishment of an independent Jewish kingdom under the Hasmonean dynasty. The Hasmoneans adopted a deliberate policy of imitating and reconstituting the Davidic kingdom, and as part of this forcibly converted to Judaism their neighbours in the Land of Israel. The conversions included Nabateans (Zabadeans) and Itureans, the peoples of the former Philistine cities, the Moabites, Ammonites and Edomites. Attempts were also made to incorporate the Samaritans, following takeover of Samaria. The success of mass-conversions is however questionable, as most groups retained their tribal separations and mostly turned Hellenistic or Christian, with Edomites perhaps being the only exception to merge into the Jewish society under Herodian dynasty and in the following period of Jewish-Roman Wars. While there are some references to maintaining the tribal separation among Israelites during the Hasmonean period, the dominant position of the tribe of Judah as well as nationalistic policies of Hasmoneans to refer to residents of Hasmonean Judea as Jews practically erased the tribal distinction, with the exception of the priestly orders of Levites and Kohanim (tribe of Levi).