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A circadian rhythm (/ s ər ˈ k eɪ d i ə n /), or circadian cycle, is a natural oscillation that repeats roughly every 24 hours.Circadian rhythms can refer to any process that originates within an organism (i.e., endogenous) and responds to the environment (is entrained by the environment).
This may occur at the same or different rates from the passage of time in the real world. For example, in Terraria, one day-night cycle of 24 hours in the game is equal to 24 minutes in the real world. [1] In a multiplayer real-time game, players perform actions simultaneously as opposed to in sequential units or turns.
A diurnal cycle (or diel cycle) is any pattern that recurs every 24 hours as a result of one full rotation of the planet Earth around its axis. [1] Earth's rotation causes surface temperature fluctuations throughout the day and night, as well as weather changes throughout the year. The diurnal cycle depends mainly on incoming solar radiation. [2]
Photoperiod or a light dark cycle is determined by the geographical location, with day time being associated with much ambient light, and night time being associated with little ambient light. [5] Light is one of the strongest influences of the suprachiasmatic nucleus (SCN) which is part of the hypothalamus in the brain that controls the ...
Day and night during the winter solstice in the northern hemisphere. The length of night on Earth varies depending on the time of year. Longer nights occur in winter, with the winter solstice being the longest. [3] Nights are shorter in the summer, with the summer solstice being the shortest. [3] Earth orbits the Sun on an axis tilted 23.44 ...
When good sleep hygiene is insufficient, a person's lack of synchronization to night and day can have health consequences. There is some variation within normal chronotypes' entrainment; it is normal for humans to awaken anywhere from about 5 a.m. to 9 a.m.
A circadian clock, or circadian oscillator, also known as one’s internal alarm clock is a biochemical oscillator that cycles with a stable phase and is synchronized with solar time. Such a clock's in vivo period is necessarily almost exactly 24 hours (the earth's current solar day). In most living organisms, internally synchronized circadian ...
Cosplay of Wilson at Pyrkon 2017. Wilson, a gentleman scientist, is the everyman protagonist of Don't Starve.While Wilson has no special abilities beyond growth of "a magnificent beard", [13] which slows the speed of freezing in winter and accelerates overheating in summer, other playable characters do: Willow, a firestarter, spawns into the world with a unique lighter which acts as a better ...