On Wednesday 11 December 2019, Marieke Liem, Associate Professor, appeared as a guest on the NPO Radio 1 podcast. The central topic of the podcast was risk perception among the Dutch population.

On Thursday 23 May, a jointly organized Lunch Seminar between the Leiden Research Lunch and the research program Interaction Between Legal Systems takes place. In this special seminar we have the honour of receiving Maria Weimer from the University of Amsterdam, who will present her new book on

As of 1 July, toxicologist Mirjam Luijten from the Dutch National Institute for Public Health and the Environment (RIVM) starts as professor by special appointment at the Leiden Academic Centre for Drug Research (LACDR).

On Friday 2 June 2023, Vincent Delhomme, Assistant professor at the Europe Institute at Leiden Law School, successfully defended his PhD thesis entitled : ‘Regulating lifestyle risks in EU law: Promoting health in a diverse market’.

If Europeans eat less meat and dairy, this will have major consequences for farmers. New research shows that many barns and machines could lose their value. With the right policies, these losses can be limited. This is shown by research from Leiden, Oxford and Vienna.

You can't see them with the naked eye, but they are highly likely to pose a threat to our health: microplastics. These tiny plastic particles are present everywhere in the environment, including within our bodies. On science platform The Conversation molecular biologist Meiru Wang offers valuable insights…

Moritz Jesse delivered a lecture titled 'Legal Risks from, to, and within EU Migration Law - An Inventory’ as part of the lunch seminar series organized by the Amsterdam Centre for European Law and Governance at the University of Amsterdam in May.

Terrorism only poses a small risk to people but tends to be a major source of public fear. Through fear, terrorism has far-reaching implications for public governance.

Rogier Kegge, Assistant Professor in administrative law and environmental law, is a member of the Dutch Health Council’s Committee on Livestock Farming and Health. The Committee recently published a report on links between goat farms and pneumonia.

The present market regulations make it extremely risky to invest in green energy, and this is impeding the fight against climate change. This is what Oscar Kraan writes in his dissertation. PhD defence on 25 April.

Promotors: Prof.dr. P.G.L. Klinkhamer, Prof.dr. P.M. Brakefield

Prisoners who are visited regularly by family or friends are less likely to be reconvicted in the short term than inmates who rarely or never receive visits. Visits should therefore be encouraged and facilitated, according to PhD candidate Maria Berghuis, who will defend her doctoral thesis on 23 June…

Thomas Moerland studied medicine and mathematics in Leiden and has a lifelong fascination with the origins and workings of intelligence. He brought all that together in his popular science book Van IQ naar AI (From IQ to AI).

For his PhD, historian and army major Dion Landstra researched the effectiveness of observers in peace operations in the Balkans between 1991 and 1995. What risks are acceptable for bringing about and maintaining peace? Landstra will defend his PhD on 28 September.

Researcher and lecturer Susana Valdez investigates how migrants make use of online translation technology in medical situations. Her research suggests that they often encounter obstacles when using machine translation in these settings. Potential problems include a lack of understanding or trust.

People who move most in the afternoon and evening are less insulin resistant than people who move mainly in the morning or spread throughout the day. This makes them at lower risk of type 2 diabetes. These are the results that researchers from the Leiden University Medical Center (LUMC) have published…

On 26 September 2023, Carlotta Rigotti was invited to give a talk on the regulatory impact of the AI Act on AI applications for recruitment and selection, during the AI Lund Fika-to-Fika Workshop on Regulating High Risk AI in the EU.

The proceeds of the Leiden University Science Run on 28 September will go to Scholars at Risk, a section of the UAF that assists refugee scholars. One such scholar is Leiden PhD candidate Lety Elvir Lazo from Honduras.

Pauline Schuyt, Professor of Penal Law and Sentencing, spoke on Dutch current affairs programme ‘EenVandaag’ about the stark rise in combination punishments that include penal hospital orders (in Dutch: terbeschikkingstelling, TBS) and custodial sentences. Since 2019, the number of combination punishments…

The environmental risks of new pesticides containing nanoparticles are inadequately researched, according to four Leiden scientists in the scientific journal Environmental Science & Technology. They call for an examination of the long-term and environmental effects of pesticides containing nanoparti…

In cities, parks take the blame for mosquito problems. However, the real issue is usually a few streets away. Drains and standing rainwater create ideal breeding grounds for larvae. As a result, controlling adult mosquitoes in parks makes little sense, says environmental scientist Louie Krol in his…

Watching and analysing hundreds of TEDx talks, that too can be research. That becomes clear from the work of PhD student Aletta Meinsma, who is studying potential problems in popular communication about quantum technologies. She explains how she approaches this and why it is so important.

Francien Dechesne, Associate Professor at eLaw, contributed as an expert to the advisory report of the organisation AlgorithmAudit, which was presented to the Dutch Minister for Digitalisation Alexandra van Huffelen on Wednesday 29 November 2023. The report contains a number of concrete norms to avoid…

On the 14th December 2016, Steven L. Schwarcz, Stanley A. Star Professor of Law and Business at Duke University School of Law gave the thirteenth Hazelhoff Guest Lecture. Professor Schwarcz questioned the often-heard assumption that systemically important financial institutions engage in excessive…

Is the current existing legal framework on compulsory and voluntary care - for vulnerable young adults (between the ages of 18 to 23) - in need of revision? And if so, what kind of amendments would be advisable?

When we are in a conversation, how do we know exactly when to respond, and how do we manage to respond so swiftly, yet without interrupting our interlocutors? Can speech melody – in particular utterance final “boundary tones” – help us determine who will speak next, or are these cues too late in the…

This thesis describes the role of pollution, specifically neonicotinoid insecticides, as an actor of the ongoing biodiversity decline.

The organisers of the big protest march against government policy, held on Sunday in Amsterdam, want to bring preliminary relief proceedings against the refusal to allow British conspiracy theorist David Icke to enter the Netherlands. Icke was due to give a speech at the meeting of the organisation…

Are you a night owl or a lark? Your lifestyle can affect your health more than you might think. PhD candidate Wietse in het Panhuis is researching this with the aid of jet-lagged mice. He explains in a Science Shot podcast

Having a chronic somatic condition can result in a variety of impairments in patients’ daily lives, including not only physical complaints such as pain, itch, and fatigue, but also problems of negative mood and impairments in social relationships. Next to disease characteristics, individual difference…

Alanna O'Malley, Associate Professor at Leiden University Institute for History, talks about the possible expelling of the Russian ambassador Yuriy Filatov and the risks that come with the decision.

The Hague has positioned itself as a vibrant student city, and with its growing student population is well on its way to becoming one. But the student housing market is struggling to keep pace.

What drives the behaviour of accountability forums?

On 28 November 2025, Leiden University and PLNT Leiden hosted “The Knowledge Orchard” - an event aimed at starting up/ enhancing interdisciplinary cooperation between academics at Leiden University, and improving collaboration between Leiden researchers and external partners in research and educatio…

On 25 January 2024 H.J. Pak successfully defended a doctoral thesis and graduated.

Jessica Vance Roitman and Wouter Veenendaal, researchers at the KITLV/Royal Netherlands Institute of Southeast Asian and Caribbean Studies, investigate the origins, development, and consolidation of political oligarchy in the Caribbean island nation of St. Maarten.

Promotor: Huub J.M. de Groot, Co-promotor: Francesco Buda

This research project adresses the question how local and traditional European forms of parrhesiastic theater— events, actions, and performances staged by characters who courageously speak their minds through scenes of excess and laughter, that take place in public view and incite the spectator’s agency…

Professor of Ecotoxicology Martina Vijver of the Institute of Environmental Sciences has given a public talk at Paradiso Amsterdam for Science & Cocktails on 4 March 2019. Her presentation was called: 'The added value & added risk of size: nanomaterials'.

The book 'The United Nations Convention on the Rights of the Child' is the result of the international academic conference – ’25 Years CRC’ – which was held in November 2014 in Leiden on the occasion of the 25th birthday of the UN Convention on the Rights of the Child.

In the summer, the government fell over migration. The more conservative course of the VVD went straight against the more progressive course of the smallest governing party. New elections were called for 22 November. This meant that the incumbent government would present a new budget just before the…

Computer says no: end of story. Twenty years ago, a hilarious line in the British TV series Little Britain, now a reality. We all blindly follow technology at times, with varying consequences. For ISGA lecturer and researcher Daan Weggemans, it's a subject worthy of a PhD.

In a new episode of The Digital Period podcast, Gianclaudio Malgieri, Associate Professor at eLaw, discusses vulnerability and data protection. He explores how power, intersectionality, and value-based design can support more empathetic and participatory technologies.

Tuberculosis stands as one of the most lethal infectious diseases worldwide. A significant challenge in combatting tuberculosis lies in the emergence of antibiotic resistance triggered by genetic alterations, commonly known as mutations. These mutations can diminish the responsiveness to antibiotics,…

Wouter Halfwerk and colleagues from Panama and the US published a paper on multisensory communication in Science. The authors provide compelling data on the consequences of multisensory perception on signal evolution in tropical frogs.

Due to gaps in working conditions regulations, airline pilots and crew are suffering from fatigue and inadequate protection in general. Leiden PhD student Yuran Shi investigated how international law can help improve working conditions and safety in the aviation sector.

Politicians in The Hague were in for an unpleasant surprise when the interview with CDA politician, and also current Dutch Foreign Affairs Minister, Wopke Hoekstra was published. Especially Hoekstra’s suggestion to let go of the Government’s target to reduce the amount of nitrogen by 2030 raised some…

This thesis is based on five papers on several topics.