PBS
Pbs: Scientific American: Never Say Die: Eat Less Live Longer
This site from the PBS production "Never Say Die" provides a section on how to eat less and live longer. The first part of this site discusses food and nutrition. The second part is an activity in which you can make a calorimeter. The...
Mayo Clinic
Mayo Clinic: Energy Density & Weight Loss:feel Full on Fewer Calories
This article is medium-sized in length and provides great information on the subject. Links are provided for additional information as well.