#aging

Explains the biology behind so-called 'old person smell': a compound called 2-nonenal produced when skin oils oxidize with age, starting as early as 40 and increasing gradually. Also covers why the odor isn't as unpleasant as the stereotype suggests, and what (little) can be done to manage it.

A Planet Money episode on the shift from earlier to later retirement — a law professor argues for mandatory retirement at 70, while an economist argues people should delay retirement even further, as younger workers say older workers staying on is squeezing career advancement.

via Building Strength and Muscle Mass: How to Optimize Training, Nutrition, and More for Longevity (AMA #71)