Sometimes fascination can lead to in-depth research. Such is the case with Wahyu Widodo, who came across the Islamic Walikutuban ritual in Java in 2019, on which he subsequently wrote his PhD dissertation. Widodo: ‘Besides community, it also breeds political loyalty’

How can chimpanzees, so closely related to humans, have almost no sense of rhythm? ‘The best students ever’ and behavioural biologist Michelle Spierings demonstrated that chimps can actually drum and move rhythmically—each following their own unique beat.

Lecture, CMGI Brown Bag Seminar

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…

In the fight for a liveable planet, we desperately need a fairer distribution of wealth and equal rights for all, argues anthropology professor Marja Spierenburg. ‘That will also generate broad-based support for sustainable development.’

Come to the Night of Discoveries art and science festival on 16 September. Various researchers from the university are speaking at the festival.

With a single sample of water or soil, researches can analyse the DNA of everything that is living in that environment. During her research, PhD candidate Beilun Zhao discovered a way to analyse not only the kind of species, but also the age of the species in a water sample. The method showed its first…

After an extremely painful conclusion, the Western allies have left Afghanistan and the Taliban have regained supremacy. How will Afghanistan move forward, and what does the departure mean for global relations? Rob de Wijk, emeritus Professor of International Relations and Security, analyses the failure…

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?

Two statues of gorillas abducting women: they were what led PhD candidate Dick van Broekhuizen to write a new type of history of nineteenth-century sculpture. ‘If you view nineteenth-century art history from a less narrow perspective, the narrative changes completely.’ PhD ceremony on 21 June.

In the Philippines, Indigenous communities have been harvesting wild honey for centuries. A new chemical analysis of this honey now provides insights into the biodiversity of the region. ‘And an additional reason to protect the national tree properly,’ says lecturer Merlijn van Weerd of the Centre for…

More papers, more grants, more students: constant growth is still the gold standard at universities. Neuroscientists Anne Urai and Claire Kelly argue that this mentality obstructs us in resolving such complex societal problems as the climate crisis. Their alternative? The university as a doughnut.

Recently, the oldest parts of the Leiden University Archives have been preserved and digitised thanks to a grant from Metamorfoze. This makes an important source on the history of Leiden University – and academic life in the Northern Netherlands in a broader sense – widely available.

Mariska Kret, Professor in Cognitive psychology has been awarded the European Research Council (ERC) Public Engagement with Research Awards 2022. Kret convinces the jury with 'RecognizeYourself - Bringing science to the zoo. Involving the public into the study of great apes emotions'.

The sixth edition of the lecture series Duurzaamheid & Recht was held during the last semester. Once again, it attracted many students.

Jelle Wouters (RTC Bhutan), Erik de Maaker (CADS Leiden) and Radhika Gupta (CADS Leiden) have been awarded a €260.000 grant by the Gerda Henkel Foundation for the research project ‘Perpetuating Highland Heritages of Bhutan’. This 4-year research project focuses on vernacular and unacknowledged heritages…

How do you combine the growth of wind energy with the protection of vulnerable seabirds? With her master’s thesis on this delicate balance, Sofie Hajer won the 2025 Unilever Research Prize. Her work provides new insights into how ecology and policy can strengthen each other.

Conference

Distracted eating is common and has adverse health consequences. Read more about the research of Leiden social psychologist Lotte van Dillen and some strategies to combat that behavior.

Panel discussion

In a new video series for the Corpus Kids Academy, researchers Marieke Bos and Janna Marie Bas-Hoogendam explain how the adolescent brain develops and how anxiety works. 'We wanted to present the information simply, while still preserving the complexity.'

Community Meet-up & Networking

Lecture, LUCL Colloquium

Roundtable

What motivates citizens to participate in a citizen science project on plastic pollution? And does that motivation change over time? Liselotte Rambonnet tried to answer these and other questions with her research on the Clean Rivers (‘Schone Rivieren’) project. Rambonnet is a PhD student at the Institute…

Debate

Even though the COVID-crisis continuously evolves and is marked by new realities and uncertainties, we can carefully begin to take stock looking back on the first phases of Dutch crisis management. What can we learn reflecting on the crisis strategies of this extraordinary and transboundary crisis that…

Ratna Saptari is since 2007 Assistant Professor at the Institute of Cultural Anthropology and Development Sociology. She has always been involved with issues of human rights and Indonesian workers' rights. This August she retired. But she won't sit still. She continues her voluntary work and wants to…

The Leiden Ranking – Open Edition is completely transparent. The ranking compiled by the CWTS uses open data and publishes the algorithms that are used.

Lecture, Research Seminar Medieval and Early Modern History

On paper it is recycled, but in reality enormous quantities of plastic waste from the Netherlands end up in Asian seas. Researchers from the Leiden Institute of Environmental Sciences charted the fate of plastic food packaging waste from the Netherlands. They published their results on July 8 in the…

Russian literature is awash with disputes, riots and intense political debates. In the new Dutch podcast Schandaal en Controverse in de Russische literatuur, senior lecturer Otto Boele and film maker and journalist Kay Mastenbroek discuss the most talked-about Russian books published in the past two…

In a significant step toward restoring cultural heritage, PhD candidate Marie Kolbenstetter has played a pivotal role in repatriating a collection of 133 archaeological artefacts from the prestigious Musée du quai Branly in Paris back to their place of origin in southern Honduras. Her efforts underscore…

The Herta Mohr Building is leading the way in sustainable innovations, for both Leiden University buildings and beyond. It is the university’s first fully gas-free building and the new Thermal Energy Storage system alone will cut carbon emissions by 150,000 kg per year. The building has an ‘Excellent’…

How do you compare the living environment of Dutch dairy cows with that of Masai cattle in East Africa? And how can we reverse biodiversity loss? These questions are central to CurveBend, an international research consortium in which ecologist Michiel Veldhuis plays a key role.

In 2025, Leiden University College (LUC) celebrates its 15th anniversary with the theme 'Global challenges, local impact'. To kick off this anniversary year, we have shared fifteen stories over the past few weeks showcasing how LUC students, researchers, and alumni contribute to societal challenges…

Leiden PhD candidate Jo-Anne Verschoor discovered that nearly twenty percent of the bacterial strains she studied could degrade plastic, though they needed some encouragement to do so. ‘Bacteria are just like people,’ says Verschoor. Her research was published in the journal Communications Biology,…

The numbers of asylum seekers and the direct family members hoping to join them were not the problem, says Mark Klaassen. The stumbling block was the housing market. He says the asylum crisis is being used for electoral gain.