Sonja Barend distantieert zich van het toneelstuk Sonja, dat gebaseerd is op haar boek. Dirk Visser, hoogleraar intellectueel eigendomsrecht, gaf uitleg in het AD: ‘De auteurs hebben het recht om te zeggen dat ze niet meer achter de productie staan.’

Lions in Kenya respond very differently to human land use, climate and conservation practices. That is the conclusion of thesis from Leiden biologist Monica Chege. A uniform approach is therefore insufficient. ‘Effective conservation only works when management is tailored to local conditions and developed…

Leiden biophysicist Stefan Semrau was granted an NWO Vidi earlier this month. He will use the grant to study the role of electricity in embryonic development and tissue regeneration.

How can Ronald Mulder run his skates across an ice layer at 60 km/h? His skating blades get help from a lubricating layer of meltwater. In Leiden, physicists found this explanation to be incomplete. Theoretician Hans van Leeuwen and experimental physicist Tjerk Oosterkamp searched for a deeper answe…

Effectively treating a severe case of pneumonia is often challenging. Identifying the pathogen behind it can be difficult. PhD candidate Ilona den Hartog tried something new: ‘We searched for answers in substances our own body produces.’ PhD defence on 17 September.

The American president Trump is considering military intervention in Mexico to get rid of the drug cartels once and for all, but Mexico is not interested in other countries' interventions. According to Jelle van Buuren, Assistant Professor at the Institute of Security and Global Affairs, Trump's much…

This study is important because it seeks to uncover whether clinicians' communication influences neurobiological and physiological outcomes for patients.

As a student, Thijs Brocades Zaalberg was primarily interested in diplomacy surrounding conflicts. Through research on peace operations and subsequently the fight against guerrillas, he became increasingly involved with the most violent aspects of colonial warfare. Per 1 September 2024 he is appointed…

What if you could watch a single cell eat in real time? This could answer questions about diseases such as cancer. PhD candidate Yixuan Wang has developed a glowing chemical tool that makes this possible, revealing how living cells take in nutrients.

On this page you can learn more about the history of our Faculty Awards and view the previous winners.

Rector Magnificus Carel Stolker expressed his support in the media for 'The Real Opening,' the protest against government cuts. 'The plans are a disaster for higher education.' Professor Remco Breuker, one of the organisers of this protest on 2 September, called in NRC Handelsblad for a stop to the…

Other COI publications can be found on Leiden Law Blog, the Leiden Law Methods Portal, and in the drop-down tabs below.

The archaeology of transregional exchange (1st millennia BCE-CE)

The Leiden Lectures in Media | Art | Politics (MAP) is a series of talks organized by Pepita Hesselberth and Yasco Horsman. Speakers from various academic backgrounds and in different stages of their careers reflect on diverging ways in which technological and social changes challenge and transform…

The Leiden Political Economy Group (L-PEG) is a multi-disciplinary network of scholars with a research interest in (comparative / global) political economy based at Leiden University. Our members belong to various institutes and faculties across Leiden University, and from other universities across…

The central question in this study is: ‘What can the Netherlands learn from the way in which these countries have organized law enforcement and the rule of law in their overseas territories?’

On 29 January 2019, Robbert van Eijk defended his thesis 'Web Privacy Measurement in Real-Time Bidding Systems, A Graph- Based Approach to RTB system classification'. The doctoral research was supervised by Prof. dr. H.J. van den Herik.

Are there elements of the lost performance practice of the nineteenth century that we can rediscover and use to shed new light on the performance of Brahms’ music for orchestra today?

Madeleine O. Hosli & Jaroslaw Kantorowicz analyze EU states' foreign policy divergence at the UN General Debate, assessing if Lisbon Treaty reforms increased EU cohesion or if states maintain distinct positions.

We are a dynamic research group at the Leiden Institute of Physics. Our aim is to explore and understand quantum materials, including strange metals, high-temperature superconductors, and quantum critical electron matter.

How do individuals make decisions? What determines the quality of group decisions? When and why do people cooperate with others? How does intergroup competition evolve?

On 9 January 2019, Marieke Wierda defended her thesis 'The Local Impact of a Global Court: Assessing the Impact of the International Criminal Court in Situation Countries'. The doctoral research was supervised by Prof. dr. C. Stahn en Prof. dr. L.J. van den Herik.

We are interested in understanding the mechanics of soft materials, of which biological materials are prominent examples.

This article assesses Russian rhetoric toward Ukraine from 2004 to 2019 by analyzing statements by the Russian Ministry of Foreign Affairs.

Ludo Block wrote the eleventh chapter of the book 'Post-Crimea Shift in EU-Russia Relations: From Fostering Interdependence to Managing Vulnerabilities'. His chapter 'Business as Usual? Police Cooperation under a Cloud of Political Animosity' can be found on page 204 of the book.

Through a lens that examines the intersection of ageing, gender, class, and migration, this project addresses the “care deficit” in European countries and the employment of migrant women from Latin America to fill this deficit.

The central aims of MicroClock project are to describe the B. subtilis circadian clock at molecular and functional levels, and discover the mechanisms of clock-regulated bidirectional signaling between B. subtilis and the model plant Arabidopsis

Dialogue is a multi-dimensional communication mechanism whose processes can only be examined by means of an interdisciplinary approach.

The mission of science based business (SBB) connects the domains of science, business, and policy. Scientific research we focus on at Leiden in areas such as artificial intelligence promises to reshape our societies for the better. Translating science into positive societal impact however requires new…

On 28 February 2019, Kabir Duggal defended his thesis 'Principles of Evidence in Investor-State Arbitration, Burden, Standards, Presumptions & Inferences'. The doctoral research was supervised by Prof. dr. E. De Brabandere.

Ever since the FDA approved the drug bedaquiline, which interferes with the bioenergetics of Mycobacterium tuberculosis by inhibiting the activity the F0F1-ATP synthase, respiratory-chain enzymes have been an active target space for the discovery of new antibiotics. To aid in this pursuit, we aim to…

On 7 February 2019, Helena Ursic-Vrabec defended her thesis 'Uncontrollable: Data subject rights and the data- driven economy'. The doctoral research was supervised by Prof. dr. S. van der Hof.

There's a whole lot to discover and experience in nature. But children who grow up in the city are seeing less and less greenery. During the Out and About! days junior school pupils will be going on a green expedition in their neighbourhood.

Get on your bike… or your tandem, unicycle, electric bike, tricycle, penny-farthing, rickshaw or road bike! We’re going on a bike trip!

What plants grow along ditches in the Leiden region? What does this say about vegetation quality? Could it be better? Naturalis and Leiden University's Center for Environmental Sciences are looking for your help to answer these questions.

The 11th edition of Leiden Museum Night will take place on Saturday 18 May 2019. Nine museums will once again be opening their doors. As it is Leiden University’s 444th anniversary this year, we will be celebrating in style at the Academic Historical Museum.

In recent years, and especially since the ‘Arab Spring’ of 2011, a growing body of research, media reporting, and scholarly literature has focused on the role of ‘Arab youth’ as the drivers of social and political movements across the Middle East and North Africa.

Peter Flach is Professor of Artificial Intelligence at the University of Bristol. An internationally leading scholar in the evaluation and improvement of machine learning models using ROC analysis and calibration, he has also published on mining highly structured data, on knowledge-driven and explainable…

Through a lens that examines the intersection of ageing, gender, class, and migration, this project addresses the 'care deficit' in European countries and the employment of migrant women from Latin America to fill this deficit.

The overarching clinical aim of this thesis was to improve pharmacological pain management by characterizing the pharmacodynamics of analgesics.

The 80,000 visitors to the Liberation Day Festival in The Hague on 5 May can learn about 444-year-old Leiden University at a range of interactive events on Malieveld and in the Dutch Parliament.

On 21 March 2019, James Welch defended his thesis 'The Grotius Sanction: Deus Ex Machina. The legal, ethical, and strategic use of drones in transnational armed conflict and counterterrorism'. The doctoral research was supervised by Prof. dr. P.B Cliteur.

Stam defended his dissertation ‘Freedom of speech and the suppression of discrimination in the Netherlands: a constitutional-developmental approach’ on 12 November 2025. The doctoral research was supervised by Afshan Ellian and Bastiaan Rijpkema

The CMCB brings together microbial cell biology expertise in Leiden. It aims at optimal resonance between the groups and maximal exploitation of the available infrastructure and to develop innovative cross-boundary technology platforms.

Are you a student from Indonesia, planning to study in Leiden?