✅ Les 4 chronotypes: :bear:, :lion:, :wolf: et :dolphin:

✅ True Circadian rythm is a cyclical 24h period which is regulated by a circadian clock, the most well known being the sleep/wake cycle. It is influenced by elements called zeitgebers such as light or temperature. https://my.clevelandclinic.org/health/articles/circadian-rhythm https://en.wikipedia.org/wiki/Circadian_rhythm A person's chronotype refers to the propensity of a person to feel alert or sleepy at a certain time and therefore reflecting variations in circadian rhythms. These four animals are one of several classifications of sleep chronotypes with each person falling within a certain spectrum of a chronotype, though, there is no scientific consensus about this classification. https://www.sleepfoundation.org/how-sleep-works/chronotypes https://en.wikipedia.org/wiki/Chronotype