The most commonly used convention in radiocarbon dating. 1950 is the date that the calibration curves were established.
The older terminology for dividing time was AD and BC, the one meaning anno domini (in the year of our Lord) and the other meaning “before Christ.” All time in the western world has been looked at through this lens. In the last few years, some Christian scholars (and several non-Christian writers) have begun to use CE and BCE, which refer to the “Common Era” and “Before the Common Era” respectively.
Such a perspective is not necessarily hostile to the Christian faith.
More flakes were knocked off from both sides of a stone and there is evidence that the maker had a preconceived notion of the tool's final form.
Acropolis - The "high point" or citadel of an ancient Greek city, like the Acropolis in Athens.
It is generally a raised area above the rest of the city where the most important sacred and secular buildings are brought together.
The buildings on the Athenian Acropolis were important for trade and worship.
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Before AD/BC were used, Christian scribes either marked time from creation (or the birth of Adam or even Abraham) or from the ruling powers.
Of course, if their assessment as to the beginning of creation was wrong, then that dating scheme is skewed.
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