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An era is a period of time with no fixed duration. It is measured from some important occurrence or date.For example:

"The discovery of antibiotics marked an era in modern medicine." or "The Christian era." etc..

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Q: How many years is an era?
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Related questions

How many years have you been in the common era?

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.


How many years ago was Paleozoic era?

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How many years was the precambrian era?

Began 5 billion years ago


How many times longer then the Mesozoic Era was the Paleozoic Era?

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.


How many years is the Precambrian era?

The Precambrian era spanned approximately 4 billion years, making it the longest geologic time period in Earth's history.


How many years between 25000 Before the Common Era and 31 Before the Common Era?

25,000 - 31 = 24,969.


How many years ago did the era in which you live in begin?

it would be around 650 millions of years ago


How many years ago did the prehistory era end?

325 BC[or]AD325


How many years has it been since the common era began?

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".


How many millions of years ago did the era in whih you live begin?

it would be around 650 millions of years ago


How many years did the Precambrian Era span?

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.


How many millions of years ago did the era in which you live begin?

it would be around 650 millions of years ago