Each type of rock, according to the theory, formed during a specific period in Earth history.

As it happens, another noteworthy event in Earth history took place around the same time.

My veto was based on the dynamics of Earth history.

If he remembered clearly his Earth history, this had been a period of peace.

I studied Earth history a lot my last two years in school.

Earth history is well known to us until the 21st century.

I ran across the term some years ago in the reading of an Old Earth history.

There are a lot of other histories than Earth history.

Willie is the only one who knows his Earth history, so he names just about everything in the system.

"Then we aren't really talking about Earth history at all."