Just collecting here some things I’ve been learning lately:

  • A book: Internal Time, on chronotypes and the effects of chronotype diversity in populations and cohorts.
  • From that book, get this: “We are only beginning to understand the potentially detrimental consequences of social jet lag. One of these has already been worked out with frightening certainty: the more severe the social jet lag that people suffer, the more likely it is that they are smokers. Tis is not a question of quantity (number of cigarettes per day) but simple whether they are smokers or not … Statistically, we experience the worst social jet lag as teenagers, when our body clocks are drastically delayed for biological reasons, but we still have to get up at the same traditional times for school. This coincides with the age when most individuals start smoking. …”
  • It’s about light! : “Even a well-lit workplace exposes us to no more than 100 Lux, which translates to 1,200 Lux-hours over the course of a 12-hour workday. Meanwhile, on a cloudy day, the intensity of outside light is about 120,000 Lux, which means even a short 20-minute walk outdoors would expose us to 40,000 Lux-hours, or more than thirty-fold the exposure of that entire indoor workday.”
  • Another gem: entrepreneurs and inventors are more likely to be late chronotypes, perhaps “because they were more challenged in school than early types, and always had to invent clever strategies to help them perform despite not being on top of things.”
  • All this from this post on Brainpickings.
  • Another good collection of information, including a study showing that early rising is not correlated with health, wisdom, or wealth, B Franklin be damned.
  • NY Times column that uses the fantastic terms “euchronia” and “dyschronia”.
  • Random peripherally related article on a guy who was an owl, and who did really interesting research on the mathematical relationship between the physical world and its mental image.