There are some fresh insights from Australia that help explain why it's so difficult for dieters to keep off the weight they lose.
Willpower will only take you so far, in case you haven't run that experiment yourself. Turns out our bodies have a fuel gauge, not entirely unlike the gas gauge on our cars, that tell us when it's time to tank up on food.
What if you could time-travel back to Memphis' Sun Studios in the 1950s? Behind the console would be none other than producer Sam Phillips. You might hear such classic songs as "My Happiness," "Crazy Arms" or "Walk the Line," originally recorded at Sun Studio by Elvis Presley, Jerry Lee Lewis and Johnny Cash, respectively.