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The first millennium began in 1 AD and ended 1000 AD. The second millennium began 1000 AD and ended 2000 AD. The third millennium (The current millennium) began 2000 AD and will end in 3000 AD.
The scientists will take time to complete the studies of all the rocks, and the studies are done in various countries as well.
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It began in Oct 1957 when Russia launched Sptunik; it ended in July 1969 when America landed on the moon.
They have to study the moon rocks, as more were brought and a detailed study had to be done, this takes years and it was done in various countries.
It began in 1789 and ended in 1799.
it began 1850 and ended 1877
It began in 1861 and ended in 1865.
began in his front yard and ended in his parlor.
its began in 1929 and ended about in 1939
it began in 1200 AD and ended in 1532 :-) :-) .
It began in 1812 and ended in 1814
It began 753 B.C. And ended 476 A.D.
it started in 2000 and ended in 2345. it started in 2000 and ended in 2345.
The period of modernism began in 1914 and ended in 1939.
It began in Guyana in 1838 and ended in 1917, in Trinidad and Tobago it began in 1845 and ended in 1917 as well...
Mesozoic