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Originally posted by Hephaestus Like you say, "How would we know?"
Originally posted by Gseven
For decades, I've consistently clocked 15-minute showers.
These days, however, I have found myself having been in the shower for well over an hour, with it feeling like I had only been in for 15 minutes doing the same things I've always done. I only have a 50 gallon water tank, and I take REALLY hot showers - there's no way my water tank could last that long a few years ago, but somehow it does today. Strange? I think so. The phenomenon is not limited to just me though....my entire family experiences this same time issue. Things that "feel" like a few minutes ends up being WAY longer than we realized. Losing track of time is a very common phrase in my home. If we were a cassette tape, it feels like someone pushed the fast forward button. The same music is still there on the tape, and nothing has changed, but it's all going by faster.
A circadian rhythm, popularly referred to as body clock, is an endogenously driven, roughly 24-hour cycle in biochemical, physiological, or behavioural processes. Circadian rhythms have been widely observed in plants, animals, fungi and cyanobacteria (see bacterial circadian rhythms). The term circadian comes from the Latin circa, meaning "around", and diem or dies, meaning "day". The formal study of biological temporal rhythms such as daily, tidal, weekly, seasonal, and annual rhythms is called chronobiology. Although circadian rhythms are endogenous ("built-in", self-sustained), they are adjusted (entrained) to the environment by external cues called zeitgebers, the primary one of which is daylight.
1. The Earth's rotation around its axis generates daily en- vironmental cycles. The most conspicuous daily environmental cycles are those of ambient temperature and illumination. The daily environmental cycle of greatest importance to organisms is the alternation of light and darkness. A civil day lasts 24.0 hours and includes a seasonally-variable interval of light (day), a variable interval of darkness (night), and two twilights (dawn and dusk). Many human populational activities exhibit daily rhythmicity in synchrony with the civil day.
2. Biological processes that cycle in 24-hour intervals are called daily rhythms (or, less often, nycthemeral rhythms). When a daily rhythm is endogenously generated, but still susceptible to modulation by 24-hour environmental cycles, it is called a circadian rhythm. Many behavioral processes of individual organisms exhibit daily and/or circadian rhythmicity, including locomotor activity, feeding, excretion, sensory processing, and learning capability. Rhythms of locomotor activity have been the most thoroughly-studied behavioral rhythms.
3. Many autonomic processes of individual organisms exhibit daily and/or circadian rhythmicity, including the control of body temperature, cardiovascular function, melatonin secretion, cortisol secretion, metabolism, and sleep. Rhythms of body temperature have been the most thoroughly-studied autonomic rhythms. The body temperature rhythm of a representative tree shrew (a small, primitive primate) is depicted in Figure 1. Specific information about rhythmicity in human vital signs is available here.
Originally posted by Essan
Hmmm, only 16 hours in a day. That's about right. I wake at 07.00am, go to bed at 11.00pm - and no sooner do I close my eyes than it's 07.00am again!
Originally posted by TheGreatRevelation
Time is going much faster in recent years... I also feel it...
Although the existence of the Schumann Resonance is an established scientific fact, there are very few scientists who are aware of the importance of this frequency as a tuning fork for Life. I propose that it is not merely a phenomenon caused by lightning in the atmosphere, but a very important electromagnetic standing wave, acting as background frequency and influencing biological oscillators within the mammalian brain. At the time when Schumann published his research results in the journal `Technische Physik', Dr Ankermueller, a physician, immediately made the connection between the Schumann resonance and the alpha rhythm of brainwaves. He found the thought of the earth having the same natural resonance as the brain very exciting and contacted Professor Schumann, who in turn asked a doctorate candidate to look into this phenomenon. This candidate was Herbert König who became Schumann's successor at Munich University. König demonstrated a correlation between Schumann Resonances and brain rhythms. He compared human EEG recordings with natural electromagnetic fields of the environment (1979) and found that the main frequency produced by Schumann oscillations is very close to the frequency of alpha rhythms.