On December 16, 2023, our respected and beloved former colleague prof.dr.ir. Bert Peletier passed away.

The United States and the European Union need to work together more closely in the field of the law to fight terrorists and criminals who are operating increasingly internationally. This was the advice given by American Minister of Justice Loretta Lynch during her visit to Leiden University on 1 Jun…

How can we guarantee the safety of the crown witness scheme for both crown witnesses and lawyers? How can we ensure that online conversations between lawyers and their clients remain confidential? And what are the risks of extra secure communication tools?

Young people tend to take more risks than children or adults. This trend is related to the reward centre in the brain, which is much more active when they are rewarded, PhD candidate Barbara Braams discovered. Personality, testosterone levels and social context also play a role in risk-taking.

What determines healthy behavior and how do you promote healthy choices and routines? These are a few questions currently being addressed by Marieke Adriaanse, recently appointed Professor of Behavioral Intervention in Population Health Management at the Leiden University Medical Center (LUMC).

Early December, lecturer Joris Timmermans gave the first virtual reality lecture at the Institute of Environmental Sciences. Together with the Centre for Innovation, he developed an innovative teaching method for the master's course Methods in Biodiversity Analysis. The first results look promising.…

Tackling radicalisation among young people is a complex issue in which government authorities may choose to apply legal measures. PhD student Nina van Capelleveen examined the risks such legal instruments can pose to the fundamental rights of minors.

Last week, Humanities Lab honours students presented their research through creative posters and pitches at the Capstone Conference in PLNT Leiden. It was a special edition, where alumni and teachers reminisced over the programme’s 10-year history.

Former PhD student Cameron Mackie will been awarded not one, but two dissertation prizes for his thesis on the aromatic universe. His work could provide us with a virtual sniff of space. ‘These molecules in space likely smell like a big charcoal grill!’

This year four research trainee projects were approved by the faculty to be carried out at the Institute for History this semester.

Starting as an MP during the Covid-19 pandemic and after the recent ‘role elsewhere’ debacle during the coalition talks for a new Dutch government, alumna Mariëlle is looking forward to making a real contribution in society.

A pill can make you better, but how exactly does it work? Primary school children from The Hague found out during a visit to the Centre for Human Drug Research (CHDR) as part of a new teaching module ‘The journey of a pill’.

Designing innovative algorithms, thinking outside the box, and brainstorming over coffee with his colleagues — this is what physicist Stefano Polla enjoys most. His success shines through in his nomination for the C.J. Kok Jury Award 2024 for PhD thesis of the Year.

The student navigator ‘Find your way’ helps students find their way around the university. The ombuds officer for students, Eugène van der Heijden, can also be found on this roadmap. Eugène talks about his work as ombuds officer and what he does for students.

Two Leiden researchers have demonstrated how mathematics can improve our healthcare. Daniel Gomon has developed a model that contributes to the quality of care in hospitals. Marta Spreafico works on an app that helps physicians make well-informed decisions about the treatment of a certain type of cancer.…

Laura Boncz was a member of the faculty board last year as an assessor of the Faculty of Social Sciences. Robin Buijs will take over from September. In this article Laura looks back and you can meet Robin.

Robin Smith, post-doc of the 'Food Citizens?'-project wrote an interesting blog for the Leiden Anthropology blog on the basis of her previous fieldwork on the role of trust in the wine industry in Istria.

A smart city is of no use if its residents don’t trust it. Tanaquil Arduin, Chief Data Officer at the Municipality of The Hague, and Bram Klievink, Professor of Digitalisation and Public Policy at Leiden University, explain how this can be avoided – to some extent. ‘Make sure civil servants and residents…

How do you engage students in times of corona? Sara Brandellero, co-chair of the study programmes for Latin American studies, created assignments that require a wide-ranging set of skills. And the results were beautiful.

The student members of the University Council are now halfway through their term. We asked them what they have so far been able to do for their fellow students, and what is still on the list for the remainder of the year. ‘It's all about refining policies.'

What is the current situation of human rights in relation to detention under criminal law and immigration law, now that more and more parties are becoming involved in the administration of detention and crimmigration is on the rise? PhD defence on 21 January 2020.

What is the effect of a certain regime on a country’s migration policy? Political scientist Katharina Natter compared the migration policy of autocratic Morocco with that of democratising Tunisia. Her findings challenge some of the core assumptions.

Amidst the lathes and welding machines of the Fine Mechanics Department, Emiel Wiegers is working concentratedly on a metal cylinder. He and his colleagues design and construct components for researchers' set-ups. ‘We are a bunch of inventors who enjoy helping the researchers in our Faculty.’

Can astronomers mitigate climate change? This is what Leiden astronomer Leonard Burtscher and his colleagues discussed at the annual meeting of the European Astronomical Society. For the second year in a row, the meeting was online. And according to Burtscher, it should stay that way. During a special…

Joachim Koops, Professor of Security Studies and Scientific Director of Leiden University’s Institute of Security and Global Affairs (ISGA) has been awarded a ‘Jean Monnet Chair’ with a focus on ‘The European Union’s Role in Security and Global Affairs’ (EURISGA).

From March 2023, political scientist Katharina Natter (Leiden University) will lead part of an ambitious project called PACES, funded by Horizon Europe and coordinated by Simona Vezzoli (ISS). PACES is an innovative, inter-disciplinary and multi-level research project that offers a groundbreaking approach…

A time-lapse of the universe in more detail than ever before: that’s the aim of the NSF–DOE Vera C. Rubin Observatory in Chile, which will unveil its first images of the night sky on 23 June. Researchers at Leiden Observatory have played a major role in making it all possible.

In the midterm elections in the United States on 6 November, the Democrats won the majority in the House of Representatives, thus regaining control of the House over the Republicans. But the Republicans expanded their majority in the Senate. Three of our researchers, experts on US politics, share their…

Sam de Schutter won the Brill/Diplomatica Mattingly Prize 2019 for his article “A Global Approach to Local Problems? How to Write a Longer, Deeper, and Wider History of the International Year of Disabled Persons in Kenya”. We asked him some questions about the research he is doing that has led to this…

The challenges of building a sustainable society are unprecedented. But the Dutch municipalities cannot be faulted for their commitment. They are working hard, conclude Professor Eefje Cuppen and Lian Merkx, programme manager for energy at the Association of Netherlands Municipalities (VNG). To exchange…

Who determines what is wrong with children and how they develop? Educator and sociologist Annemieke van Drenth wrote a book about this that will be released on 10 June. In it, she uses the history of the school for ‘idiotic children’ in The Hague to investigate how special children were identified in…

The fact that Tim Meijers ended up becoming a philosopher came as no surprise. Even as a child, the university lecturer endlessly asked questions to himself and others. Now that is his job at the Institute for Philosophy at Leiden University. Tim Meijers researches sustainability and justice between…

From 6-8 April 2026 the conference

A public symposium was held at Leiden University on 20 February on a hot topic: renewable energy. This is the second time in a year that the University has organised such a symposium. The previous one, about Artificial Intelligence, was a big success.

Leiden physicists Alexandre Morin and Samadarshi Maity study self-organisation and flocking phenomena. They shed light on flocking, which helps to understand how it is possible that birds in a flock don't collide. With plastic microbeads, they create an experimental setup and they developed a mathematical…

A mix of data research, artificial intelligence and archaeology led to lively discussions on 31 January. On that day the unique event 'AI & Data Science @ Archaeology' took place in which the Data Science Research Programme (DSRP), SAILS and the Faculty of Archaeology joined forces.

The NWIB Visiting Professors Programme offers assistant professors, associate professors and full professors at participating universities (see below) a unique opportunity to work undisturbed in an inspiring and stimulating environment. This programme enables you to stay at one of the five Netherlands…

'What nature made isn’t necessarily an optimized medicine to use in the human body,’ says Professor of Biological Chemistry Nathaniel Martin. That’s why a group of Leiden researchers is making a chemistry-based improved version of the frequently used antibiotic vancomycin. They received an NWO NACTAR…

What if particles don’t slow down in a crowd, but move faster? Physicists from Leiden worked together and discovered a new state of matter, where particles pass on energy through collisions and create more movement when packed closely together.

On 27-28 January 2022, Leiden University’s interdisciplinary seed grant programme ‘Beyond Anthropocentric Interests and Values? Human Rights and Climate Change’ will host a conference on human rights and climate change. Researchers are welcome to join and contribute their view. The deadline for the…

Religious studies specialist and historian Tom-Eric Krijger talks about the new pope. Will he be a mediator or someone who dares to take a stand?

Psychiatrists in Morocco can't ignore Islam. Driss Moussaoui was one of the first modern psychiatrists in this North African country. He delivered the LUCIS annual lecture on 12 April.

The New Scientist magazine has selected two young Leiden scientists for its Top 25 Young Talents in the Netherlands and Flanders: historian Karwan Fatah-Black and neuropsychologist Mariska Kret. Who will be the winner? You can vote for one of them!

The Young Academy Leiden (YAL) acquired six new members on 1 September. We talked to the new and former chair of this platform for young academics about what they have achieved over the recent period and what is on the agenda for the coming year.

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…

In a publication in Science, Noam Zelcer from the Division of Biopharmaceutics describes a previously unrecognized pathway to regulate LDL-cholesterol levels. He is also able to modulate this pathway. This opens the possibility for complementing and improving the efficacy of statins: A class of drugs…

The more data from cancer research we pool, the better we can search for new treatments. But how can we keep patient data safe when sharing it? Leiden researchers will tackle this challenge in a major European project.

This summer, political scientist Thijs Vos received the Kaare Strøm prize for his paper ‘Power or Ideology? What structures legislative voting behaviour in Dutch municipal councils, ideology or coalition-opposition dynamics?' He was awarded the prize during the ECPR summer school on parliaments in F…

It is with profound sadness that we have learned of the passing of our colleague and friend, Dr Harold M Hays. Harold passed away on Wednesday 20 November, in his sleep, as a result of heart failure.

Learning about the newest communication technology in China and solving a business case at telecom giant Huawei. Four Leiden science students get to know China's Silicon Valley.