The age of the Earth is approximately 4.55 billion years old. "BC" or known academically as "BCE" for " Before common era" started 2010 years ago. So using this calendar system, the number of "BC years" is 4.55 billion years - 2,010 years which is still about 4.55 billion years when you round the numbers. The fact is, we can get a pretty good idea of how old the earth is plus/minus a few hundred million years. So when we have an uncertainty of 100 million years, subtracting or adding 2,010 years is kind of meaningless. It's like me asking you when you went on vacation last. You may answer "2 months ago". If I ask you how long since the night before your last vacation, you would still answer "2 months ago" since you would find it pointless to add 8 hours to that time.
"BC years" refer to years before the common era, so the number of BC years is based on how far back one goes in history. For example, 500 BC means 500 years before the common era.
6 thousand at least.
Archimedes was born in 287 BC and died in 212 BC, making him 75 years old when he died.
The exact duration of the period known as "Before Christ" (BC) varied depending on the calendar system being used. In the Gregorian calendar, BC lasted for 2019 years before transitioning to the "Anno Domini" (AD) system.
Petra was believed to have been constructed over a period of about 100 years, with work starting in the 1st century BC. The site reached its peak in the 1st century AD as the capital of the Nabatean Kingdom.
The Acropolis in Athens, Greece was built in the 5th century BC during the Golden Age of Pericles. Construction on the iconic buildings, such as the Parthenon, began in 447 BC and continued for about 15 years.
It is the symbol for the word 'Circa'. It means 'about' when describing a time reference. Therefore C 5000 BC. Would mean around 5000 years before the christian era. Also refered to as the common era. See the related link for more inforamtion.
2451 years
470 years.
49 years
545 years.
208 years
2451 years.
918 years
2451 years
2450 years
90 years.
1900 years.
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