Quotation

The Cancer Chronicles

Unlocking Medicine's Deepest Mystery
Actual quote on page 57 of hard cover (corrected by author in e-book):--- A demographer at the population reference bureau made a rough calculation. By A.D. 1, the earth' s cumulative population had already approached 50 billion (???), and the number had nearly doubled to 100 billion by 1850 (????). I was surprised by the magnitude.