Before revision: Naturally occurring DNA damages (mostly due to cellular metabolism and the properties of DNA in water at body temperatures) occur at a rate of more than 60 ,000 new damages, on average, per human cell, per day.
After revision: Naturally occurring DNA damages (mostly due to cellular metabolism and the properties of DNA in water at body temperatures) occur at a rate of more than 60 new damages, on average, per human cell, per day.