The Common Era is a period coinciding with the Christian era, which began 2,011 years ago. So we have been in that era for 2,011 years.
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Began 5 billion years ago
The Paleozoic Era was about 2.5 times longer than the Mesozoic Era. The Paleozoic Era lasted from about 541 million years ago to 252 million years ago, while the Mesozoic Era lasted from about 252 million years ago to 66 million years ago.
The Precambrian era spanned approximately 4 billion years, making it the longest geologic time period in Earth's history.
25,000 - 31 = 24,969.
it would be around 650 millions of years ago
325 BC[or]AD325
The "Common Era" began in what would have been January 1, 0001 AD in the proleptic Gregorian calendar. It has been 2,010 years since the beginning of the "Common Era".
it would be around 650 millions of years ago
The Proterozoic eon was the third eon in Earth history. It lasted from 2.5 billion years ago to 542 million years ago. Therefor, the Proterozoic was nearly 2 billion years long.
it would be around 650 millions of years ago