Great article, thanks for posting. I read though the comments and noticed there was no mention of intermittent fasting. It is based on a similar study where caloric intake in lab animals, was restricted. The long term result showed an increase in longevity. Encouraged by these results, a second study was conducted whereby the animals were permitted free access to food, but the window of time was restricted to only 8 hours; they termed this intermittent fasting. This also showed an increase in longevity. I am not certain the time of day they allowed feeding to occur, or if it would have interrupted the circadian rhythms....
Adapting the findings to humans, shows some good results, as well. Dr. Mike has a very informative video here:

Enjoy