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PODCAST

Light O'Clock

Translational Sensory & Circadian Neuroscience Unit (MPS/TUM/TUMCREATE)

We break down the science behind circadian rhythms so you can be enlightened. In each podcast episode, we chat with experts in the field about a variety of topics, spanning from the effects of light on our biology and how it can be used for the treatment of psychiatric disorders and beyond. Contact us: lightoclock@tuebingen.mpg.de Website: https://tscnlab.org/podcast

science

All Episodes

00:01:10

Light O'Clock goes live: Send us your questions!

Light O'Clock ·

2025/10/21

Light O’Clock is going live from Vienna at Buch Wien 2025 on Saturday, 15 November – and this time, you set the agenda for the episode!Together with Marie Luise Schreiter, we’ll be diving into your questions about how light shapes our brains, bodies, health, and daily rhythms – live on stage. What have you always wanted to know about light, sleep, or circadian rhythms? Send us your question through this link: https://form.jotform.com/252533837926365

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00:57:51

Season 3 – Episode 5: Drowning in light – The hidden...

Light O'Clock ·

2025/08/26

For our Season 3 finale of Light O’Clock, we dive into a timely and often overlooked issue: light pollution. Artificial light at night has become a constant in modern life — but what are the hidden consequences?Our guests, Barbara Harding, Travis Longcore and Karolina M. Zielińska-Dąbkowska, bring scientific insight into how nighttime light exposure may affect human health, including possible links to cancer, and how it disrupts wildlife, ecosystems, and natural rhythms. We also explore practical

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00:41:25

Episode 4: Too early to think? Why school start times...

Light O'Clock ·

2025/07/29

Why do early mornings feel so brutal for teens? In this episode, we explore the science behind teenage sleep and circadian rhythms and why early school start times may be setting students up for failure.We talk to students from Italy and Germany, and sleep researcher Dr. Anna Magdalena Biller, to understand how biology, not laziness, is behind teen sleep struggles — and what schools, parents, and teachers could do about it. Big thanks to Margha, Lea, Giulia, Alice and Viola for sharing their

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00:32:59

Episode 3: Blurred vision – The myopia epidemic and...

Light O'Clock ·

2025/05/29

Today, more and more children around the world are developing myopia, or nearsightedness — especially in East Asia, where prevalence among school-aged children can reach up to 70%.Can simply spending more time outside in daylight help protect children from developing myopia? In this episode, our guest Asst. Prof. Raymond P. Najjar (National University of Singapore) breaks down: What we know about the link between light exposure and myopia in children Why kids aren’t spending enough time outdoors

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00:33:19

Season 3 – Episode 2: City lights, country nights –...

Light O'Clock ·

2025/04/29

How does life in cities versus rural areas shape our circadian rhythms? How does access to electricity — or the lack of it — impact sleep timing? And what happens to our circadian rhythms when we move from an urban setting to camping outside?Our guest LuísaKlausPilz (Charité - Universitätsmedizin Berlin)comments on field studies carried out when she was a PhD student and postdoc at the Federal University of Rio Grande do Sul (Laboratório de Cronobiologia e Sono - HCPA/UFRGS). Links and resources

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00:35:43

Season 3 – Episode 1: Tick-tock trouble – How clock...

Light O'Clock ·

2025/03/25

On 30 March 2025, Europe will switch to Daylight Saving Time (DST), moving clocks forward by one hour. While many people enjoy longer evenings, scientists in sleep and circadian research argue that DST can be harmful to our health. In this episode, we dive into the controversy surrounding DST and answer three key questions:Why do chronobiologists want to get rid of DST? What does the evidence say about DST’s impact on road traffic accidents? What does the public think about abolishing DST? We hear

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00:03:36

Season 3 – Trailer

Light O'Clock ·

2025/03/18

Light O’Clock is back with a brand new season! In the next five episodes, we’re looking beyond the biology of body clocks to explore how our modern world shapes our biological rhythms — and how politics and society influence decisions about our body clocks.We’ll cover the controversies around clock changes and school start times, discuss how indoor lifestyles might be affecting our vision, compare rhythms of people living in big cities and rural areas, and assess the impact of light pollution on

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00:33:29

Spotlight: Research, rooted in reality – The power of...

Light O'Clock ·

2025/02/25

How do individuals with lived experience and researchers come together to co-design a scientific study? In this special episode of Light O’Clock, we hear from Patrica Pelosi and Nomhle Nhlapho, who have lived experience of bipolar disorder and have contributed to shaping the HELIOS-BD study (more in our previous episode). We also hear from Dr Amy Ferguson, who works closely with the Lived Experience Advisory Panel of the HELIOS-BD study and is the coordinator of the Circadian Mental Health

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00:40:04

Spotlight: The dark side of daylight (Daylight...

Light O'Clock ·

2024/10/31

On the occasion of Daylight Awareness Week 2024 (28-31 October) and Halloween, Light O’Clock is partnering up with the Daylight Academy to bring you an extra special episode that blends the science, the spooky, and the supernatural! Our host dives into the eerie mysteries of circadian rhythms, sleep and daylight with Prof. em. Anna Wirz-Justice, a pioneer in the field of chronobiology.Tune in to learn about the witching hour, twilight, the forbidden zone, sundowning and much more! This episode is

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00:40:42

Season 2 – Episode 5: Shedding light on… circadian...

Light O'Clock ·

2024/10/29

In today’s episode, we dive deep into the relationship between light, circadian rhythms and mental health with Prof. Daniel Smith from the University of Edinburgh. What role do light sensitivity and circadian rhythms play in bipolar disorder? How can we design studies to answer key questions in this area, and how can the involvement of patients ensure the success of a research study? Tune in to get the answers to these and many other questions about light, circadian rhythms and mental health. Links

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00:25:56

Season 2 – Episode 4: In and out of sync

Light O'Clock ·

2024/10/15

Did you know that your body has many body clocks? Like instruments in an orchestra, they each have a specific role to play, but how do they stay in rhythm with each other? In today’s episode, Dr. Laura Kervezee dives deep into the different body clocks, who is the conductor that makes our body run in harmony, and what happens when the rhythm goes out of sync. Timestamps(00:00) Intro (01:18) Introducing Dr. Kervezee (01:46) The different body clocks (03:20) How do these clocks sync? (05:00) The

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00:34:03

Season 2 – Episode 3: Early birds and night owls –...

Light O'Clock ·

2024/10/01

Are you an early bird or a night owl? Can you choose to be an early type? In this episode, Dr. Anna M. Biller from the Technical University of Munich explains what chronotype is, how it changes throughout the lifespan, what happens when your biological clock and your social clock are out of sync, and how can you measure your type. Listen to uncover the answers to these and many other fascinating questions about chronotype.Links and resources related to the episode’s contentMorningness-Eveningness

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00:28:35

Season 2 – Episode 2: Sleep and circadian rhythms –...

Light O'Clock ·

2024/09/17

In today’s episode, we dive deep into the relationship between circadian rhythms and the sleep-wake cycle with Dr. Renske Lok from Stanford University. Are they different or the same? What other processes in the body regulate your sleep? Can you catch-up on lost sleep? How can you even know if you are sleep-deprived and need more sleep? Tune in to get the answers to these and many other questions on sleep and circadian rhythms. Links and resources related to the episode’s contentGraphic of sleep

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00:25:58

Season 2 – Episode 1: Cave studies and fruit flies –...

Light O'Clock ·

2024/09/03

In this episode Prof. Orie Schafer, based at the CUNY Advanced Research Center, takes us through the history of the field of chronobiology, from its beginnings in plants, through studies in bunkers with humans, and the discovery of the clock genes thanks to the tiny but mighty fruit fly.Links and resources related to the episode’s contentPhotos of Jürgen Aschoff’s 1960’s bunker experiment [https://www.spiegel.de/geschichte/chronobiologie-schlaflabor-im-bunker-a-951188.html] Original publication on

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00:04:26

Season 2 – Trailer

Light O'Clock ·

2024/08/30

Light O'Clock is back with a brand-new season starting next week! In this season, we will dive deep into the relationship between circadian rhythms and health (mental and physical), shedding light on what happens when we "break" the rhythms, when we do not live according to our chronotype and much, much more! Stay tuned for new episodes starting next Tuesday, 3 September 2024.Follow us on social media to stay up to date with our episodes and discover related content: Twitter/X:

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00:33:39

Episode 6: You ask, we answer – special Q&A episode

Light O'Clock ·

2024/05/16

[This episode is available as a video episode on YouTube.]In occasion of International Day of Light (16 May 2024), the Light O’Clock team is bringing you an extra special episode: We answer your burning questions on the topic of light and circadian rhythms! Our host unpacks listeners’ questions with guest Prof. Dr. Manuel Spitschan from the Max Planck Institute for Biological Cybernetics and the Technical University of Munich. Links and resources related to the episode’s content: UNESCO

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00:38:09

Episode 5: Shedding light on… pupil size across the...

Light O'Clock ·

2024/04/30

In this episode of Light O’Clock, Caro Guidolin chats with Rafael Lazar, a PhD student in the field of chronobiology at the University of Basel. Rafael studies the real-world effects of light on the pupil. He elaborates on the impact of light on the pupil as he talks us through his remarkable study of pupil measurement under authentic, real-world conditions. Additionally, our guest highlights why current metrics for measuring light may not reflect our non-visual perception of light. Tune in to

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00:25:55

Episode 4: Melatonin – the night time hormone

Light O'Clock ·

2024/04/16

Have you ever wondered why most people lean towards dark bedrooms for a good night's sleep? How light at night can affect our sleep is the focus of this episode of Light O’Clock. Dr. Elise McGlashan, an expert from the Melbourne School of Psychological Sciences, joins us to discuss how our bodies use light to regulate melatonin production, the nighttime hormone crucial to our sleep-wake cycle. Join us for this enlightening conversation with Dr. Elise McGlashan on Light O'Clock as we uncover the

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00:23:55

Episode 3: Using light to tell time

Light O'Clock ·

2024/04/02

This episode, neuroscientist Prof. Robert Lucas from the University of Manchester and your host, Caro Guidolin, explore the multifaceted roles of different cells in the human retina. Learn about how a single type of cell can have a massive influence on our internal body clock and why there is a growing significance of light design in all our lives. These and other interesting topics will be tackled in this episode of Light O’Clock!Contact us: lightoclock@tuebingen.mpg.de Website:

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00:23:29

Episode 2: Light’s journey through the eye

Light O'Clock ·

2024/03/19

In this episode, we delve into the topic of how our eyes deal with visible light and enable us to see colours and details. Join your host, Caro Guidolin, as she teams up with vision scientist Dr. Maydel Fernandez-Alonso from the Max Planck Institute for Biological Cybernetics to unravel the enigma of the eye! Our guest will guide us through the intricate journey of light as it weaves through the anatomy of the eye and into our brain.Contact us: lightoclock@tuebingen.mpg.de Website:

en

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