4 ms·
The zero year for the "Before Present(BP)" timescale is 1950. BP was used by carbon dating scientists first and 1950 was a nice round date a few years before th
by njarboe 7y ago
The zero year for the "Before Present(BP)" timescale is 1950. BP was used by carbon dating scientists first and 1950 was a nice round date a few years before the year when carbon dating[1] no longer worked due to atmospheric nuclear testing.
[1]https://en.wikipedia.org/wiki/Radiocarbon_dating https://en.wikipedia.org/wiki/Radiocarbon_dating