"I like nonsense, it wakes up the brain cells." - Dr. Seuss
Question #143 posted on 08/15/2003 midnight

Dear 100 Hour Board,
Where does body heat come from? I mean, I know that the blood circulates and keeps it going to the extremities and such, but where does it actually come from?
- Wonder Boy

A: Dear Boy,
Just as you learned in your intro level Physics or Chemistry class, work produces heat (remember all of that crazy entropy and enthalpy stuff?). Your body generates heat through all of the work that it's doing every second of your little life. The human body can only function (and survive) within a very narrow temperature range, and so the brain closely monitors body temperature and makes adjustments to compensate for anything that starts upsetting the balance (e.g. shivering to warm you up if your body temp drops too low, sweating to cool you down).