How can you figure out which points lie on a certain curve? And how many possible curves do you count by a given number of points? These are the kinds of questions Pim Spelier of the Mathematical Institute studied during his PhD research. Spelier received his doctorate with distinction on June 12.

Wilke Geurds graduated from the Visual Ethnography master's programme last year with her intimate and vulnerable documentary 'F*ck Endo. More than just menstrual pain.'.

Laura Kamsma, Head of the International Office of our Faculty kept a travel log during her visit to the EAIE conference. You can read her report here.

There are more molecules that could conceivably be candidate drugs than there are stars in the universe. How can we ever efficiently identify those molecules? Professor of AI and Medicinal Chemistry, Gerard van Westen: ‘I’m going to use artificial intelligence as the co-pilot to make an automated search.’…

How do you tell your professional story? This formed the basis of the Personal Branding workshop for young alumni at PLNT, the Leiden Centre for Innovation and Entrepreneurship on 22 July. Forty-five alumni came along.

On the south coast of Sri Lanka is a colonial fort. Since it became a world heritage site, the fortified town of Galle has suddenly become a major tourist attraction. This has its pros and cons, says PhD candidate Uditha Jinadasa. PhD defence on 12 March.

This is a good time for it to happen, in the opinion of Professor of Fatherlands History, Henk te Velde. The abdication of Queen Beatrix is a good starting point for celebrating 200 years of the Dutch monarchy, in 2013. Te Velde is a member of the National Committee for 200 Years of Monarchy: 'By standing…

A huge shiny aluminium object stands in the middle of the Polderlab in Oud Ade. Are the researchers trying to make contact with extraterrestrial life? Certainly not; they are using the ’Moon landers’ to measure whether innovative forms of agriculture reduce greenhouse gas emissions. Fleur van Duin works…

Jeroen Zwemmer’s student days in Leiden ended in 2023, after completing two bachelor’s degrees, a master’s, a student board year, and an exchange semester. Now, he’s a legal policy advisor at a Dutch government ministry.

How can we as a society prevent suicide? According to Professor of Suicide Prevention Renske Gilissen, a better understanding and targeted action could help save lives.

Humanity is a widely used concept in organisations, yet it is rarely given concrete meaning. As a result, it often remains vague and non-committal, with dehumanisation as an unintended consequence. According to Marjon Bohré, practising humanity requires making deliberate choices, in language, decision-making…

Current electrochemical theory does not adequately describe realistic platinum electrodes. Scientists at Leiden University have now, for the first time, mapped the influence of imperfect platinum surfaces. This provides a more accurate picture of these electrodes, with applications in hydrogen production…

Leiden Law School alumnus Dave Wesselink began his career as a lawyer in 2022. He’s also a professional bobsledder. ‘When you’re tearing round a bend at 130km/hour, you need to be able to stay calm and focused on what you’re doing.’

On 26 January, Rowie Stolk, Laura Hanrath and Marloes Noorloos spoke at the lecture ‘The Right to Demonstrate under Scrutiny’. This discussion session, part of the university lecture series Community. Conversation. Connection., was organised in response to difficult questions about the right to demo…

Leiden researchers have found clues to why a rare pregnancy disorder is mild in some babies but life-threatening in others. Their discovery opens the door to a test that could identify severe cases during pregnancy. Fortunately, a treatment already exists.

The World Food Programme, Philips, the European Space Agency. An overwhelming list of organisations that Sarita Koendjbiharie, as founder of the PRINS consultancy programme of International Studies, has managed to recruit. ‘We keep reaching new highs and insights together with our students and organ…

Woensdag 7 september bezochten de nieuwe eerstejaarsstudenten Rechtsgeleerdheid en Criminologie de Stadsgehoorzaal voor een College Tour met als thema: Strafzaken en de media. Presentatrice Annemarie Brüning, bekend van Hart van Nederland, ging hierover in gesprek met professionals uit het vakgebied…

In many Central and Eastern European countries, a period of greater openness emerged in the late 1980s. How did this affect the future perspective of residents? And can we learn anything from this period for our current times? University lecturer Dorine Schellens delves into the literature to investigate…

Where is the dividing line between man and machines? What makes us wiser than robots? How do you know if a film on internet is real? These are the questions that will be addressed at the Brave New World conference on 8 and 9 November.

Students used to live with a landlady or even with the professor whose course they were taking. Student accommodation has since become more professional, making it something the new government will have to tackle. What should the new government do?

Recently Professor Joanita Vroom’s book Feeding the Byzantine City was published by the prominent academic publishing house Brepols. This volume is the fifth in a series called Medieval and Post-Medieval Mediterranean Archaeology, of which she is the editor. ‘This series aims to offer new perspectives…

Terrorism is not a successful communication strategy. After an attack, the attention quickly shifts from the terrorists to authorities and citizens. This is what Jeanine de Roy van Zuijdewijn argues in her dissertation: 'The aftermath: meaning-making after terrorist attacks in Western Europe'. ‘A year…

Smooth platinum electrodes roughen and wear when subjected to repeated cycles of oxidation and reduction, which causes nanometer-scale mounds to grow. Leiden chemists Leon Jacobse and Marc Koper, together with physicist Marcel Rost, discovered the exact details, using a unique tunneling microscope.

The Scriptiewerkplaats (thesis workshop) is an initiative of Leiden University, TU Delft, Erasmus University Rotterdam, and the municipality of The Hague. Students conduct research based on issues that are currently happening in The Hague South-West. We interviewed Mandy Koenraads, Scriptiewerkplaats…

When assistant professor Jiyan Ilbrink isn't working at the university, she can be found in her vegetable garden. On the plot of land around the corner from her home, she grows the most delicious tomatoes, zucchini, and potatoes.

David Versluis successfully simulated an infant gut virtually. This is crucial for research on improvements in formula milk. Currently, such research primarily relies on diaper contents, which is not optimal. Versluis defended his doctoral thesis on April 23.

Betty de Jonge is a household name in our faculty. As the person behind AskBetty, she knew how to answer every question about Office. Starting this month, she has officially retired.

What do you get when you combine traditional storytelling, new technology, and a whole lot of creative passion? Sumak Kichwa Wawa, an Andean children's storybook using augmented reality, that's what! Assistant professor, Martine Bruil and researcher Ximena Buller Machado tell us more about this special…

What if we start taxing carbon-intensive products such as electricity and gasoline, and at the same time compensate low-income households? Hauke Ward and colleagues did just that in a computer simulation for Peru, with a remarkable outcome. Not only does the approach tackle climate change, but it could…

The changes that humans are making to the landscape are beneficial for mosquitoes that spread diseases such as Zika, chikungunya and dengue. This is what biologist Maarten Schrama and his colleagues write in the journal Nature Scientific Reports. ‘If we know in which living environments mosquitoes thrive…

Intensify cooperation between the Institute of Security and Global Affairs (ISGA) and the Netherlands Defence Academy (NLDA). This is the purpose of the agreement that will be signed on 16 November at the Campus The Hague. On that day, Defence Minister Ank Bijleveld will also give a lecture in Wijnhaven…

Leiden University is under fire: it is allegedly doing too little to tackle antisemitism. Rector Hester Bijl responds to this accusation and to a video from 2014 on social media in which extreme remarks are made. ‘We can be short about such comments: they are unacceptable. The university is and always…

An important part of the Leiden Leadership Programme (LLP) is the practical assignment that students are given by a partner organisation. How does this benefit the organisations? Two Leiden partners talk about working with the students.

In donut-shaped buildings, particle accelerators take super-detailed X-ray images. Yet those images are not good enough to learn how to drive on hydrogen for example. Mathematics PhD student Allard Hendriksen has developed an algorithm that improves the images without having to learn from data from…

Three Leiden professors have recently been awarded the most prestigious scientific accolade in the Netherlands: Maria Yazdanbakhsh and Marc Koper have been awarded a Spinoza Prize and Judi Mesman a Stevin Prize. They received their prizes on 13 October.

Pope Francis has appointed astronomer Ewine van Dishoeck to the Pontifical Academy of Sciences. She joins an illustrious list of Nobel Prize winners, such as Ernest Rutherford, Max Planck, Niels Bohr and Erwin Schrödinger. What is her view on this? An interview with our professor of Molecular astrop…

Over 20,000 students, lecturers, administrators, support staff and many others protested on 25 November against the plans to make billions of cuts to higher education. Students and staff from Leiden University also travelled to The Hague to voice their objections to the disastrous plans.

People who have negative expectations about a treatment actually experience more pain. Merve Karacaoglu discovered in her PhD research that anxious and pessimistic individuals are particularly susceptible to this nocebo effect. However, this sensitivity comes with a silver lining.

Researchers from the Netherlands Cancer Institute, the Leiden University Medical Center (LUMC) and Oncode have created a tracking system that can reveal how often cells have divided. This allowed them to find a yet undiscovered population of immune cells: young memory cells that behave like stem cells.…

Anthropologist Rodrigo Ochigame studies how AI is changing the practice of scientific research. From astrophysics to mathematics to climate science, they find that the adoption of new AI models is raising questions about what counts as reliable scientific evidence.

Is Europe skilling for sustainable food?

How tolerant is the Netherlands on the work floor? Jojanneke van der Toorn, Professor of the Workplace Pride Chair, the first in the world dealing exclusively with LGBT inclusion in the workplace, answers questions on the International Day against Racism and Discrimination.

Nine museums in eight days, and an average of 25,000 steps a day? You must be talking about a trip with the Leiden Art History Association! In July, 20 students and a lecturer travelled to New York to take in all the art, architecture and other high points the city has to offer. We spoke to Joëlle Daems,…

The government is digitalizing and making use of ‘big data’ in its decision making processes. But the expectations of digitalization are often overly optimistic, according to Bram Klieving, Professor Digitalization and Public Policy. Klievink is about to start with multidisciplinary research looking…

Migration is not only reflected in DNA, but also in language. By tracing changes in language, we learn more about the lifestyle of the people that speak it. University lecturer Tijmen Pronk (40) conducts linguistic research into (pre)historical migration.

Sometimes an idea seems so logical and elegant at first glance, that you later wonder why no one thought of it before. Two researchers from LACDR have teamed up to develop a completely synthetic alternative to antibodies—one that mimics their size, shape and function, but which is cheaper, more stable,…

It was a unique meeting at the Academy Building on 10 April. Around 200 local entrepreneurs came to a networking event hosted by Leiden City Centre Management and Leiden University.

Are all murderers calculating psychopaths with an obscene predilection for bloody chainsaws? Yes, if Hollywood is to be believed, but in the real world they are generally everyday people with problematic backgrounds. Professor of Violence and Interventions Marieke Liem therefore calls for the demythologisation…

Sending migrants back. Open borders. These are the kinds of words that are used, but what does the situation really look like at these borders? Professor of Law and Society Maartje van der Woude, an expert in crimmigration, is researching precisely this.

Food security touches upon human rights, international law and sustainable development. These frameworks are not separate worlds but deeply interconnected; something that becomes painfully clear in times of climate crisis, armed conflict and inequality.