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There are more metals available now than there was 200 years ago. This is because more metals have been harvested.The reason is because of advancements and increased accuracy in technology. Other metals became more readily available overtime as it became possible to extract metals from their ores. These technologies were not available 200 years ago.
200 years ago
However many were needed. If a company ordered 200 computers from Microsoft, Microsoft would make 200 computers.
200 years ago
Until about 200 years ago people thought that sponges were aquatic plants.
In 2017 it is 200 years ago.
No one 2009 it was 200 years ago. 1809 Wars vs Finland.
Subtract 200 from 2013 and you have the answer.
About 200 million years ago.
Pangea began to drift apart about 200 million years ago. Pangea split into two smaller continents: Gondwana and Laurasia. These continents lasted from about 200 million years ago to 100 million years ago.
The 2nd century AD was about 1800 years ago. This refers to the period between there years 100 and 200 AD.
40 million years ago