In millions .
ca is an abbreviation of the Latin word 'circa' = about, so ca 300 refers to about 300 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.
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.
1712
300 years ago
The year 2800 BC was 3461 years ago. This is because AD started on the year 1, not on the year 0.
The 19th century was the 1800's, so it was from 210 to 110 years ago.
It is believed that lignite was formed about 300 million years ago. It is thought that this old lignite is what produced a lot of the coal that is used in modern times.