The pine boards in my house weigh more per volume than pine boards that I can buy today. I read or heard once that old-growth wood is denser (therefore, heavier

The pine boards in my house weigh more per volume than pine boards that I can buy today. I read or heard once that old-growth wood is denser (therefore, heavier) than new-growth wood. I don't know if this is true or a myth, but if anyone reads the paper, let me know if this is discussed as a possible limitation or explanation for the discrepancy.