It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.

It has been known that the earth is round.

It is known that the earth is round.

It was known that the earth was round.

It was known that the earth is round.