Tag: circadian rythem

BioClock in the news: What shy zebrafish teach us about the biological clock

Written by bioclock on April 23, 2026. Posted in News.

Dutch newspaper de Volkskrant recently spoke to BioClock researcher Christian Tudorache, who works at the Institute of Biology in Leiden. Together with his team, he has succeeded in breeding confident and shy zebrafish. A link between these traits and the production of the stress hormone came as no surprise. What they had not expected, however, was a clear difference in the fish’s biological clock. The research Christian’s research showed that confident fish have a much...

Media round-up: from exam timing for students to giant space mirrors

Written by bioclock on April 14, 2026. Posted in News.

BioClock researchers have been making their voices heard, contributing to podcasts, newspapers, and national television. Recent media appearances covered topics ranging from student exam timing to ambitious plans to illuminate the night sky using mirrors in space. Podcast: Stress Navigation In the podcast Stress Navigation, an initiative of the Stress in Action consortium, BioClock researcher Joëlle Oosterman explains the role of the biological clock in health, stress,...

BioClock in the spotlight as we switch to daylight saving time

Written by bioclock on March 30, 2026. Posted in News.

As we transition into daylight saving time once again, the biological clock takes center stage in public discussion. Several BioClock researchers recently had the opportunity to share their expertise in national media, offering insights into the historical roots of daylight saving time, its societal impact, and its consequences for our biological clock. The History of Daylight Saving Time and Why It’s Time for a Change Together with Universiteit van Nederland, Maaike van der...

Early bird or night owl? New BioClock research reveals that light sensitivity plays a big role

Written by bioclock on March 4, 2026. Posted in News.

Light is one of the most powerful signals synchronizing our biological clock to the outside world, but people differ widely in how sensitive they are to light. A new BioClock study, recently published in SLEEP, takes a closer look at how these individual differences in light sensitivity relate to chronotype – whether someone is naturally an ‘early bird’ or a ‘night owl’. The BioClock research team, led by Dr Laura Kervezee, conducted this ambitious study at the NEMO Science...

The clock starts ticking early: circadian variation in preterm breastmilk

Written by bioclock on January 27, 2026. Posted in News.

Human breast milk is surprisingly adaptive, consistently changing to best meet the baby’s needs. Even the time of day has been known to affect its composition. But what happens when a baby is born very prematurely? A new study by BioClock researchers Demy van Gilst and Inês Chaves aimed to find out if 24-hour variations are already present in breastmilk following a very premature birth. Researchers collected around 15 milk samples over 72 consecutive hours,...

New publication: circadian biology in the Intensive Care Unit

Written by bioclock on December 23, 2025. Posted in News.

Critically ill patients often experience severe disruption of their sleep cycles and circadian rhythm during their stay in the Intensive Care Unit (ICU). Constant artificial lighting, continuous nutritional intake, and 24/7 medical procedures interfere with the natural rhythms that normally help regulate our internal clock. Research shows that circadian rhythms play a crucial role in physiological regulation, recovery, and overall health, raising an important question: how can we...