ca is an abbreviation of the Latin word 'circa' = about, so ca 300 refers to about 300 years ago.
About 300 million years ago.
it was 300 years ago
300 + 2013 = 2313
About 300 million years ago the continents collided to form the 'supercontinent' of Pangea. It was the PALEOZOIC era.
300 CE was 1,713 years ago, as of 2013 AD. The abbreviation of CE stands for Common Era and is a different way of saying AD, which is an abbreviation for Anno Domini.
Moscow,but about 300 years ago the capital was St.Petersburg
From about 300 million years ago to 180 million years ago.
300 years ago - roughly the same time as the industrial revolution escalated.
300 years ago
1712
1712 years ago