If your fingers or toes ever turn pale (or even ghostly white) and go numb when exposed to cold, you might assume you just have poor circulation. That’s what I used to think when I first started noticing this problem with my own hands many years ago. It usually happened […]
Does sleeping with an eye mask improve learning and alertness?
![Does sleeping with an eye mask improve learning and alertness?](https://jeanfrancoispoirier.com/wp-content/uploads/2024/03/9a21d266018c6eb0f3b2469673f106b0.jpg)
All of us have an internal clock that regulates our circadian rhythms, including when we sleep and when we are awake. And light is the single most important factor that helps establish when we should feel wakeful (generally during the day) and when we should feel sleepy (typically at night). […]