With ambiguous findings the day before were made by scientists from the University of Michigan. They found a link between body mass index of the person and the presumable duration of his life. According to researchers, overweight people on average live a longer life.
Note, this is about people with a small deviation from the norm towards increased body mass. In a clinical forms of obesity, the life expectancy decreases. Note, while scientists on the results of the experiment with the yeast cells.
Yeast with a relatively high content in the cytoplasm of lipids on average lived longer. "Full cells" are no different from normal functioning, so the scientific explanation of the phenomenon yet. It should also be noted that human cells are much different from yeast, so the second phase of the experiment can be counterproductive.