Who doesn’t want peace? Yet we don’t always appreciate how fragile it really is. This is why Leiden University was a co-organiser of the Just Peace Festival from 21 to 25 September 2016.

The Leiden students who participated in the iGEM synthetic biology competition have won the prize for best production. They developed a way to have bacteria produce the substance suckerine, a protein derived from the Humboldt squid. By doing so, they want to help heal burn wounds. ‘The announcement…

After three (or four) years of hard study, there are every year a lot of Bachelor students that say goodbye to go and explore the wide world. Where are they going next? And what will they miss most about our beautiful city? For the coming weeks, we will tell the stories of 6 recent Bachelor graduates…

With a trip through the Netherlands, the preparations for the graduation of the Master Cyber Security had already started weeks ago. The apotheosis took place on Thursday, the 11th of February. A report of a digital graduation ceremony.

Metamaterials have properties that depend on their shape and architecture. Researchers at AMOLF, Leiden University and Tel Aviv University have found a new way of designing these metamaterials and their properties by deliberately incorporating small errors. They publish their results today in Nature…

Alireza Nouri comes from Tehran, Iran, and is currently in his third year of the bachelor’s in International Studies at Campus the Hague.

On July 28, 2022, our dear colleague Daniëlle Hamstra passed away after a short sickbed. Daniëlle had been associated with the Clinical Psychology Section since 2010, initially as a student in the research master's program and subsequently as a lecturer and PhD candidate.

With thunderous applause, Elanor Boekholt-O'Sullivan is received at the Lorentz Hall of the Kamerlingh Omnes Building. She gazes into the hall with a smile on her face, even though the applause makes her feel slightly uncomfortable. She gets to enrich the students of the Leiden Leadership Programme…

On the Master’s Open Day on 15 February Liza Vromen from Harlem arrives in Leiden to investigate the pre-master’s programme Psychology. As a matter of fact she will look beyond that programme for a master’s specialisation which fits her personal interest.

PhD defence

PhD defence

PhD defence

PhD defence

PhD defence

PhD defence

Professor of Health Psychology Andrea Evers is one of the coordinators of the national Health and Wellbeing programme and of the Leiden-Delft-Erasmus (LDE) programme that goes by the same name. The aim is to use technology to promote our health. LDE has already been working on this topic for some ti…

On 2 July, Armin Cuyvers was interviewed on the morning news show of BNR News Radio on the ongoing fight for the EU top jobs: why is it so hard to choose a new president for the European Commission, what is happening behind the scenes, and what are the chances of Frans Timmermans?

Last Friday, the LUCL runners have run the Leiden Singelloop – this time joining forces with the rest of the Humanities team celebrating the 444th birthday of our University. Thanks to all colleagues who participated and supported us. We’ll run again next year, and everyone’s invited to join!

Secrecy can be detrimental to a relationship, but in the intelligence world, it is actually a basis for trust. What do relationships and trust really mean in this 'hard and seemingly shadowy' world? PhD candidate Pepijn Tuinier investigated it. The finding: social relations play a much more important…

We take it for granted that water comes out of the tap and electricity out of the socket. But that isn’t always the case. Last Tuesday began like any other day, with our board meeting in the morning. But things were soon to change.

Back in 2008, Jason Laffoon moved from Chicago to Leiden. He came to join the Faculty of Archaeology’s Caribbean research group as a PhD candidate. Now he is an assistant professor, bridging departments through his innovative research methods. ‘I focus both on the archaeology of the Americas, as well…

Halfway through his career alumnus Marc Tijhuis made a radical change: he left the corporate world to join the global battle against waste with the International Solid Waste Association.

A global biological study has provided the most direct evidence to date that humans, and specifically cities, are the drivers of evolutionary change on Earth. Leiden University, Naturalis and the Municipality of Leiden worked on and helped fund the study.

Scientists, and not only those in the social sciences and humanities, think that valorisation is mainly about economic profit. This is what Stefan de Jong writes in his PhD dissertation. His advice: spread knowledge about valorisation; that way it’s facts that determine the valorisation debate, and…

Because we cannot directly ask babies about what they know or what they are thinking about, we must find smart and baby-friendly ways to figure it out! Below you can read about the different methods that we typically use in our studies.

The Data Science Research Programme at Leiden University combines data science with PhD projects in a wide range of disciplines. The programme has been running for over two years, and is producing the first astonishing results. A number of PhD candidates talk about their experiences and research bel…

The Just Peace Dialogues were a set of meetings for public deliberation of key aspects of building peace in today’s world. The dialogues were held across seven days at the heart of the Just Peace Festival (16 - 22 June 2025).

How to make educational innovations practical for teachers

Some offenders are given short prison sentences. They tend to be people who are generally not faring well before they go to prison; they may have difficulty finding a job for instance. A short spell in prison can make them even more vulnerable. Attention therefore needs to be paid to continual supervision…

People who are arrested on suspicion of preparing an attack are at risk of becoming radicalised either during or after their detention. Whether or not to arrest someone requires careful consideration. At the end of the prison sentence, it is important to provide effective supervision of the reintegration…

Energy transition will entail the construction of large numbers of new energy installations. Such construction projects may meet with opposition from people living close by. Assistant Professor Bríd Walsh investigated how the local community can best take part in such projects.

Looking for ways to travel more sustainably once you've reached your destination? Here, we offer some ideas and helpful links to guide you in becoming a more responsible tourist. Ecotourism, defined as "responsible travel to natural areas that conserves the environment, sustains the well-being of…

Our immune system protects us against disease, but every now and then, something goes wrong: an enemy invades our bodies or our immune system attacks our own cells and we become ill. Doctors and researchers at the Leiden University Medical Center (LUMC) want to be able to manipulate the immune system…

We always have several ongoing studies running in our labs. Below you can find information about each one.

Past objects offer a wealth of information about life in earlier times. Loe Jacobs is an expert in making earthenware objects, using the same methods and means used in earlier times.

The Terrorism and Political Violence research group at Leiden University examines the causes of radicalisation, the tactics of extremist groups, and the effectiveness of counter-terrorism policies. We also explore the role of the media and the influence of postcolonial legacies in the Global South,…

The main purpose of DNAmarkerpoint is to better understand the ecology, evolution and biodiversity through the study of ancient- and modern DNA.

Research on the morality of life insurance. What issues are raised when insurance companies define responsibility and solidarity? Has insurance changed since the crisis of 2007?

Immerse yourself: read books, listen to podcasts and watch films about racism, discrimination and the colonial past.

From passports to policy: take a moment to look up in City Hall

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An exploratory study on the role of family members of those who joined jihadist groups

Human AI is where artificial intelligence and machine learning meet philosophy, cognitive science, and the creative arts. Examples of research questions in this domain are: 'Can an algorithm be creative by human standards?', 'Can creative processes, such as composing music or writing poetry, be modelled?',…

PhD candidates have access to various forms of material support.

The transition from fossil fuels and the practical changes that this entails make many demands on citizens. Emma ter Mors, a psychologist and lecturer at Leiden University, is researching the factors that contribute to public perception and acceptance of new energy technologies.

Thanks to data science, we can chart and search enormous quantities of related information. This generates all kinds of new insights, for example in complex global financial structures or such societal problems as loneliness.

Studying Africa’s history, cultures and languages in this programme, will give you an insight in other aspects of Africa as well, including economics, politics and international relations. In the second year, you will be able to specialise in one or more of our themes, tailoring the programme to your…