--- title: "Meaning & Key Takeaway of: It was always intriguing that flies had…" description: "\"It was always intriguing that flies had two peaks of activity, in the morning and evening, with a siesta during the day and not very much activity at n..." image: "https://sms4smile.com/quotes/i/579/michael-rosbash-30056_always_it-was-always-intriguing-that-flies-had_1505412.jpg" --- # It was always intriguing that flies had two peaks of… ![“It was always intriguing that flies had two peaks of activity, in the morning and evening, with a siesta during the day and not very much activity at night. There are several ways to explain that, but one possibility was that there were two clocks running - one governing the morning peak and one…” quote by Michael Rosbash](https://sms4smile.com/quotes/i/579/michael-rosbash-30056_always_it-was-always-intriguing-that-flies-had_1505412.jpg) [Download](https://sms4smile.com/quotes/i/579/michael-rosbash-30056_always_it-was-always-intriguing-that-flies-had_1505412.jpg) [Open image](https://sms4smile.com/quotes/i/579/michael-rosbash-30056_always_it-was-always-intriguing-that-flies-had_1505412.jpg) > “It was always intriguing that flies had two peaks of activity, in the morning and evening, with a siesta during the day and not very much activity at night. There are several ways to explain that, but one possibility was that there were two clocks running - one governing the morning peak and one governing the evening peak.” [Michael Rosbash](https://sms4smile.com/quotes/author/michael-rosbash/) ## About This Quote This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation. Flies show two daily activity peaks, suggesting separate internal clocks for morning and evening, with reduced daytime activity and minimal night activity. **In simple terms:** Flies have two daily activity periods, likely driven by two internal clocks. Key Takeaway Consider how multiple internal timers can regulate behavior. Themes biology circadian rhythms behavioral patterns Mood curious analytical Type scientific observational When to use this quote - lab experiments - field observations - comparative species studies Key Concepts chronobiology dual oscillator model Questions to Reflect On - How might environmental cues interact with internal clocks? - What other organisms show similar dual peaks? A Different Perspective The model may oversimplify complex environmental influences on activity. ★ ★ ★ ★ ★ No ratings yet [Always](https://sms4smile.com/quotes/about/always/) [Clocks Running](https://sms4smile.com/quotes/about/clocks-running-5529169/) [Day](https://sms4smile.com/quotes/about/day/) [Evening](https://sms4smile.com/quotes/about/evening/) [Evening Peak](https://sms4smile.com/quotes/about/evening-peak-5529168/) [Evening Siesta](https://sms4smile.com/quotes/about/evening-siesta-5529167/) [Flies Peaks](https://sms4smile.com/quotes/about/flies-peaks-5529166/) [Morning](https://sms4smile.com/quotes/about/morning/) [Morning Peak](https://sms4smile.com/quotes/about/morning-peak-5529170/) [Night](https://sms4smile.com/quotes/about/night/) ## Related quotes > [Once ye made up yer mind to do somethin', 'tis better t'stumble o'er the small hillock of jump-ahead than t'bash yer head on the…](https://sms4smile.com/quotes/karen-hawkins/once-ye-made-up-yer-mind-to-do-somethin-tis-better-t-stumble-o-er-the/) [Karen Hawkins](https://sms4smile.com/quotes/author/karen-hawkins/) > [Tonight I have inundated you with the mystical kundalini. 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Amy could feel it…](https://sms4smile.com/quotes/elizabeth-strout/by-the-time-they-were-pulling-into-the-parking-lot-of-the-a-p-the/) [Elizabeth Strout](https://sms4smile.com/quotes/author/elizabeth-strout/) > [It is easy enough to say that man is immortal simply because he will endure: that when the last ding-dong of doom has clanged…](https://sms4smile.com/quotes/william-faulkner/it-is-easy-enough-to-say-that-man-is-immortal-simply-because-he-will/) [William Faulkner](https://sms4smile.com/quotes/author/william-faulkner/) > [The sun, a red wheel, was sinking slowly in the west. Besides being spectacularly beautiful, the early-summer sunset was exceedingly soft and gentle: black…](https://sms4smile.com/quotes/mo-yan/the-sun-a-red-wheel-was-sinking-slowly-in-the-west-besides-being/) [Mo Yan](https://sms4smile.com/quotes/author/mo-yan/) > [Like the water of a deep stream, love is always too much. We did not make it. Though we drink till we burst, we…](https://sms4smile.com/quotes/wendell-berry/like-the-water-of-a-deep-stream-love-is-always-too-much-we-did-not/) [Wendell Berry](https://sms4smile.com/quotes/author/wendell-berry/) > [I love to work in football, so for me it's not work. I'm not here first in the morning and last in the evening…](https://sms4smile.com/quotes/daniel-farke/i-love-to-work-in-football-so-for-me-it-s-not-work-i-m-not-here-first/) [Daniel Farke](https://sms4smile.com/quotes/author/daniel-farke/) > [The evening's the best part of the day. You've done your day's work. Now you can put your feet up and enjoy it.](https://sms4smile.com/quotes/kazuo-ishiguro/the-evening-s-the-best-part-of-the-day-you-ve-done-your-day-s-work/) [Kazuo Ishiguro](https://sms4smile.com/quotes/author/kazuo-ishiguro/) > [Can You see that as soon as the day breaks I think of You? As evening comes, I am near You. I am near…](https://sms4smile.com/quotes/gemma-galgani/can-you-see-that-as-soon-as-the-day-breaks-i-think-of-you-as-evening/) [Gemma Galgani](https://sms4smile.com/quotes/author/gemma-galgani/) ## More by Michael Rosbash > [It's been overlooked for a long time as a real public health problem. All of western society is a little bit sleep-deprived, and when…](https://sms4smile.com/quotes/michael-rosbash/it-s-been-overlooked-for-a-long-time-as-a-real-public-health-problem/) [Michael Rosbash](https://sms4smile.com/quotes/author/michael-rosbash/) > [I don't drink alcohol too late in the evening; I read a good book.](https://sms4smile.com/quotes/michael-rosbash/i-don-t-drink-alcohol-too-late-in-the-evening-i-read-a-good-book/) [Michael Rosbash](https://sms4smile.com/quotes/author/michael-rosbash/) > [I am grateful to my colleagues at Brandeis and to the unusual environment here that allows researchers to explore without boundaries while also engaging…](https://sms4smile.com/quotes/michael-rosbash/i-am-grateful-to-my-colleagues-at-brandeis-and-to-the-unusual/) [Michael Rosbash](https://sms4smile.com/quotes/author/michael-rosbash/) > [I was a difficult kid and a somewhat indifferent student but realized somehow that a new start at a good place, and far from…](https://sms4smile.com/quotes/michael-rosbash/i-was-a-difficult-kid-and-a-somewhat-indifferent-student-but-realized/) [Michael Rosbash](https://sms4smile.com/quotes/author/michael-rosbash/) > [Most important for the circadian field was the pioneering work of Ron Konopka in Seymour's lab.](https://sms4smile.com/quotes/michael-rosbash/most-important-for-the-circadian-field-was-the-pioneering-work-of-ron/) [Michael Rosbash](https://sms4smile.com/quotes/author/michael-rosbash/) > [I try not to take sleep medication.](https://sms4smile.com/quotes/michael-rosbash/i-try-not-to-take-sleep-medication/) [Michael Rosbash](https://sms4smile.com/quotes/author/michael-rosbash/) > [Scientific careers rely on inheritance, environment, and random events, like all biological phenomena.](https://sms4smile.com/quotes/michael-rosbash/scientific-careers-rely-on-inheritance-environment-and-random-events/) [Michael Rosbash](https://sms4smile.com/quotes/author/michael-rosbash/) > [You've got to go for what you love and not look back 30 years, 40 years later and say, 'I never tried.' You got…](https://sms4smile.com/quotes/michael-rosbash/you-ve-got-to-go-for-what-you-love-and-not-look-back-30-years-40/) [Michael Rosbash](https://sms4smile.com/quotes/author/michael-rosbash/) > [The same biological clock ticks away in humans and fruit flies, which underscores the importance of circadian timing to life on this planet.](https://sms4smile.com/quotes/michael-rosbash/the-same-biological-clock-ticks-away-in-humans-and-fruit-flies-which/) [Michael Rosbash](https://sms4smile.com/quotes/author/michael-rosbash/) > [Immigrants and foreigners have always been an indispensable part of our country, including its great record in scientific research.](https://sms4smile.com/quotes/michael-rosbash/immigrants-and-foreigners-have-always-been-an-indispensable-part-of/) [Michael Rosbash](https://sms4smile.com/quotes/author/michael-rosbash/) > [I stand on the shoulders of giants.](https://sms4smile.com/quotes/michael-rosbash/i-stand-on-the-shoulders-of-giants/) [Michael Rosbash](https://sms4smile.com/quotes/author/michael-rosbash/) > [We benefited from an enlightened post-war period in the United States: Our National Institutes of Health have enthusiastically and generously supported basic research.](https://sms4smile.com/quotes/michael-rosbash/we-benefited-from-an-enlightened-post-war-period-in-the-united-states/) [Michael Rosbash](https://sms4smile.com/quotes/author/michael-rosbash/) > [This is the western world; if somebody can make a buck, they're going to try to do it.](https://sms4smile.com/quotes/michael-rosbash/this-is-the-western-world-if-somebody-can-make-a-buck-they-re-going/) [Michael Rosbash](https://sms4smile.com/quotes/author/michael-rosbash/) > [Shift work, where the body clock is continuously changed, is really deleterious on many levels - from psychology to physiology.](https://sms4smile.com/quotes/michael-rosbash/shift-work-where-the-body-clock-is-continuously-changed-is-really/) [Michael Rosbash](https://sms4smile.com/quotes/author/michael-rosbash/) > [The circadian neurons are one of the few circuits in neurobiology where we have a chance to understand at multiple levels how different sets…](https://sms4smile.com/quotes/michael-rosbash/the-circadian-neurons-are-one-of-the-few-circuits-in-neurobiology/) [Michael Rosbash](https://sms4smile.com/quotes/author/michael-rosbash/) [Explore all 17 Michael Rosbash quotes ](https://sms4smile.com/quotes/author/michael-rosbash/) ## More Always quotes > [I think performing has pretty much always been a part of me.](https://sms4smile.com/quotes/isa-briones/i-think-performing-has-pretty-much-always-been-a-part-of-me/) [Isa Briones](https://sms4smile.com/quotes/author/isa-briones/) > [I always thought if I was born 2000 years earlier, I would be a monk, probably carving a monastery or some giant pantheon buildings.](https://sms4smile.com/quotes/jenova-chen/i-always-thought-if-i-was-born-2000-years-earlier-i-would-be-a-monk/) [Jenova Chen](https://sms4smile.com/quotes/author/jenova-chen/) > [I always like a character who makes me laugh.](https://sms4smile.com/quotes/rachael-stirling/i-always-like-a-character-who-makes-me-laugh/) [Rachael Stirling](https://sms4smile.com/quotes/author/rachael-stirling/) > [It's always great to see old friends, especially those I have not been able to see in 15 months.](https://sms4smile.com/quotes/william-regal/it-s-always-great-to-see-old-friends-especially-those-i-have-not-been/) [William Regal](https://sms4smile.com/quotes/author/william-regal/) > [When you step out and do a song in a musical, the easier thing to do is make it funny. But when those transitions…](https://sms4smile.com/quotes/kelli-o-hara/when-you-step-out-and-do-a-song-in-a-musical-the-easier-thing-to-do/) [Kelli O'Hara](https://sms4smile.com/quotes/author/kelli-o-hara/) > [I have really good lateral movement. I've always had quick lateral movement.](https://sms4smile.com/quotes/austin-rivers/i-have-really-good-lateral-movement-i-ve-always-had-quick-lateral/) [Austin Rivers](https://sms4smile.com/quotes/author/austin-rivers/) > [There is something magical about being able to feel somebody. And that is something that has always moved me with music.](https://sms4smile.com/quotes/maria-brink/there-is-something-magical-about-being-able-to-feel-somebody-and-that/) [Maria Brink](https://sms4smile.com/quotes/author/maria-brink/) > [Mythology is something that always has opportunities to explore. 'It' has been on Earth for millions of years. He's been in contact with humans…](https://sms4smile.com/quotes/andy-muschietti/mythology-is-something-that-always-has-opportunities-to-explore-it/) [Andy Muschietti](https://sms4smile.com/quotes/author/andy-muschietti/) > [It's not writing in the traditional sense, but I've always said that the writing process continues on the set and even into the editing…](https://sms4smile.com/quotes/robert-b-weide/it-s-not-writing-in-the-traditional-sense-but-i-ve-always-said-that/) [Robert B. Weide](https://sms4smile.com/quotes/author/robert-b-weide/) > [I always watch my matches back 100 times afterwards because that's how I improve. This is something I've always done, even in NXT.](https://sms4smile.com/quotes/mandy-rose/i-always-watch-my-matches-back-100-times-afterwards-because-that-s/) [Mandy Rose](https://sms4smile.com/quotes/author/mandy-rose/) > [I've always been of the idea that is doesn't really matter where you are geographically - with 'Lonerism,' we made half the album in…](https://sms4smile.com/quotes/kevin-parker/i-ve-always-been-of-the-idea-that-is-doesn-t-really-matter-where-you/) [Kevin Parker](https://sms4smile.com/quotes/author/kevin-parker/) > [It's very easy to fool yourself that you're working, you know, when you're really not working very hard. I mean, I'm very lazy. So…](https://sms4smile.com/quotes/robert-caro/it-s-very-easy-to-fool-yourself-that-you-re-working-you-know-when-you/) [Robert Caro](https://sms4smile.com/quotes/author/robert-caro/) > [Whether it was Little League or playing with your brothers or sisters, that was always a problem. If I would lose - because I…](https://sms4smile.com/quotes/cal-ripken-jr/whether-it-was-little-league-or-playing-with-your-brothers-or-sisters/) [Cal Ripken, Jr](https://sms4smile.com/quotes/author/cal-ripken-jr/) > [I always say if you put someone from a small town into a big city for ten years, then when they go back, they'll…](https://sms4smile.com/quotes/mike-colter/i-always-say-if-you-put-someone-from-a-small-town-into-a-big-city-for/) [Mike Colter](https://sms4smile.com/quotes/author/mike-colter/) > [Bayern is always a team that can win the Champions League title in Europe.](https://sms4smile.com/quotes/lothar-matthaus/bayern-is-always-a-team-that-can-win-the-champions-league-title-in/) [Lothar Matthaus](https://sms4smile.com/quotes/author/lothar-matthaus/) [Browse all 36,048 Always quotes ](https://sms4smile.com/quotes/about/always/) ```json { "@context": "https://schema.org", "@graph": [ { "@type": "Quotation", "text": "It was always intriguing that flies had two peaks of activity, in the morning and evening, with a siesta during the day and not very much activity at night. 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