The dark matter of biology: clumps of sugar molecules that, for example, form sugary webs around pathogens. We know very little about them. Wouter Remmerswaal threw all his talent into the challenge – both in the lab and as a modeller – and succeeded. He received his PhD on 12th September.

Why do vulnerable groups fail to make use of benefits that they are entitled to? This is what Max ten Velde researched in his Master’s in Management of the Public Sector thesis, which has been nominated for the Netherlands Court of Audit’s thesis prize.

Children in the Netherlands develop prejudices based on ethnicity at an early age. Ymke de Bruijn (27) came to this conclusion in her dissertation ‘Child Interethnic Prejudice in the Netherlands: Social Learning from Parents and Picture Books’. For her PhD project she took a closer look at the behaviours…

Jasper Knoester is the dean of the Faculty of Science. How is he doing, what exactly does he do and what does his day look like? In each newsletter, Jasper gives an insight into his life.

On 30 April, Prime Minister Mark Rutte was presented with the manifesto of the NWO Youth Challenge, which contains advice for policymakers, scientists and administrators on the empowerment of youth in the time of coronavirus. The manifesto is based on research questions submitted to the science community…

The Netherlands in September 2021 could be characterised as a low-trust society. Trust in the government has declined significantly in the past one-and-a-half years: from almost 70 percent in April 2020 to less than 30 percent in September 2021. There has also been a slight decrease in trust between…

How do digital technologies affect adolescent mental health and resilience? How do we foster a secure online environment? How should we deal with increasing rates of online crimes among adolescents? During the mini-symposium ‘The effect of the online world on adolescents’, presented by the interdisciplinary…

Hydropower plants need not be disastrous for fishermen and nature. For that, we need to place new dams more strategically, but also modify or even remove some existing ones. Valerio Barbarossa and Rafael Schmitt showed that with a computer model of the Asian Mekong basin.

Monica den Boer, who has decades of experience within police and defence and was also active as a Member of Parliament (D66), has been appointed extraordinary professor of Police Studies.

A team of three students affiliated with Leiden University is shedding new light on the lives, diets, health, and mobility of individuals buried at the historic church site in Koudekerke, Zeeland. The project, a collaboration with the Walcherse Archeologische Dienst and funded by the Municipality of…

Over hundreds of thousands of years, our region witnessed the comings and goings of various types of hominin. This depended on the temperature as ice ages alternated with warmer periods. In ‘De eerste mensen in de Lage Landen’ (‘The First Humans in the Low Countries’) Leiden archaeologists Yannick Raczynski-Henk…

Horses were first domesticated in South-West Russia, is the conclusion drawn by an international team of researchers writing in the well-respected journal Nature. Their conclusion resolves a longstanding archaeological question. But, surprisingly enough, this domestication did not contribute to the…

We all know smoking is bad for our health. But we might not have known that the cigarette filters that litter our streets also impact the environment. Esther Kentin is a lecturer at Leiden Law School. She is raising awareness of the University’s cigarette butt problem.

An international team of astronomers led by Dutch scientist Martijn Oei has discovered the largest pair of jets from a black hole ever seen. The 'jumbojets' extend a combined length of 140 Milky Ways. The Leiden Observatory played a prominent role in this research. The publication will feature on the…

Greenhouse gas emissions related to pharmaceutical consumption increased by 77 percent over the past 24 years, according to a Leiden University study published in The Lancet Planetary Health. Moreover, efficiency gains have stalled since 2008. ‘Our best option is reducing consumption and minimising…

Attention to the colonial past may be increasing, but many aspects of it are still underexposed. Dutch newspaper De Volkskrant, in collaboration with, among others, Leiden researchers Anne-Marieke van der Wal-Rémy and Alicia Schrikker, therefore created a 'Canon of the Dutch Underexposed Past', which…

Jasper Knoester is the dean of the Faculty of Science. How is he doing, what exactly does he do and what does his day look like? In each newsletter, Jasper gives an insight into his life.

After three years of courses, exercises, debating and reflecting, Honours College students received their certificate during a festive ceremony. Even more than with the certificate as such, attendees were pleased with the way Honours enables students to deal with an increasingly complex world.

Eye contact between parents and children improves their mood and increases feelings of connectedness on both sides; but not in the case of depressed adolescents, Mirjam Wever discovered. Where the parent-child bond has been disrupted, it can be strengthened not only with therapy for the child but also…

No less than six Leiden projects received a grant for quantum research from the national growth programme Quantum Delta NL and the NWO. After all, in order to boost quantum technology not only industry is needed, but also science. Research towards new sensors, faster algorithms and quantum materials,…

The clever young people at the National ThinkTank who tackle an urgent societal problem each year include two Leiden alumni this autumn: Jiao Harmsen and Jort van Dalen. They will spend at least four months getting to grips with the topic of ‘education’.

Last Thursday the Dutch House of Representatives held a debate on children being put into care when the childcare benefits scandal (toeslagenaffaire) had caused problems for their families. Four Leiden University academics were asked by the House to produce a fact sheet for this debate, bringing together…

Dr Robert Heinsch and his team of IHL Clinic researchers at the Kalshoven-Gieskes Forum on International Humanitarian Law have won a prestigious Erasmus+ grant for cooperation partnerships in higher education in cooperation with the IHL Clinics at Ruhr-University Bochum (Germany) and Roma Tre University…

Peter Stevenhagen delivered daily lectures at the Syed Babar Ali School of Science and Engineering in Lahore, in collaboration with ICTP, a well-known UNESCO institute in Trieste. The aim is to enhance it he knowledge of students from low- and middle-income countries. ‘By teaching here, I can truly…

Last week, third-year students of the Bachelor Security Studies concluded a seven-week intensive programme with a two-day conference. They presented their findings in front of a full lecture hall and in the presence of the client for whom they worked on a complex security issue. Tutor Saskia Postema:…

Who doesn't love to turn on a horror film on a rainy evening? Fortunately, it is only fiction - or is it? According to university lecturer Evert Jan van Leeuwen, modern horror says more about our society than we think. He has been nominated for the Klokhuis Science Prize for his research into addiction…

Autism, Alzheimer’s, and bipolar disorder: can the development of these mental health conditions be influenced by the ketogenic diet? Increasingly, research suggests it might. 'For those it helps, it can be life-changing,' says neuroscientist Eline Dekeyster.

Following the announcement of revised financial projections at the start of the academic year, the Faculty Board was keen to engage in dialogue with the wider faculty. Through information sessions held at all institutes, at the Faculty Office and in The Hague, we met with many of our staff members to…

Suddenly getting lost, failing to recognise family members, or forgetting words and names are well-known symptoms of Alzheimer's disease. Psychologists have now discovered that the disease also manifests in more subtle ways: through the rhythm of finger tapping.

People who are often stressed can feel calmer by making certain adjustments to their breathing. Possibly this also positively affects concentration and attention. Psychologist Roderik Gerritsen studied the effects of breathing differently for the first time, and explains them. Gerritsen receives his…

In the eighteenth century, the Dutch East India Company (VOC) housed its enslaved people on ‘Slave Island’ in Colombo, the capital of Sri Lanka. Today ‘Slave Island’ is under serious threat from property developers. Senior lecturer Alicia Schrikker, together with her Sri Lankan colleagues Iromi Perera…

Ward Hoskens started ten years ago as an intern at one of Leiden's most iconic buildings: the Pieterskerk. Now he is doing his PhD on the question of how the function of this 'church that is no longer a church' changed over recent centuries.

Facility

Fossil teeth can preserve remarkable information, much like a biological identity card with data about the lives of individuals tens of thousands of years ago. By analyzing teeth, a new study published in Science Advances reconstructed the life history of four straight-tusked elephants (Palaeoloxodon…

Since January 2026, Alex Geurds has been the new Dean of the Faculty of Archaeology. His start was calmer than many expected, but behind that calm lies a period of exploration, listening, and strategic forward thinking.

Science thrives on freedom, safety, and stability. But what if these prerequisites are lacking? What if colleagues beyond our borders are threatened, persecuted or forced to flee?

Five consortia within the Perspectief programme that include Leiden researchers have received funding to start their research projects. These projects focus on (further) developing technological innovations, with societal and economic impact at their core.

As a student, you’re expected to write papers and collaborate. But how do you do that if you’ve never been taught? Thanks to the Grassfields grant, the Science Skills team can scale up its Skill’Ed project and finally provide students with structured support in essential skills.

Bezoek

Debate

Debate

Lunch Seminar

Debate

There is a reasonable chance that you came to this reading list through a social medium. Now it's our job to keep your attention. We are going to do our best. There are so many distractions; from notifications on your phone, to another screen near you, that may also be screaming for attention. Every…

Conference

Lecture, Leiden Yemeni Studies Lecture Series

Lecture