Lecture

Micro- and nanoplastics cause stress to crops such as lettuce and carrots, PhD candidate Laura Julia Zantis found. This can lead to reduced growth and a lower nutritional value. Biodegradable plastics have this effect too, likely because of chemicals they release during degradation.

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.

LUC students research the Geul river’s restoration, combining sediment studies, biodiversity assessments, and policy insights for global environmental challenges

Researchers from Leiden University, McMaster University and Public Health Ontario are calling on colleagues to track down archival specimens of mosquitoes from museums and other collections and to examine them with modern methods. This will tell them more about malaria transmission.

What do you do as a government if you are at a loss? You ask an expert for help. In the seventeenth-century Republic of the Seven United Netherlands, one expert after another popped up to advise one of the many regional authorities. In her Veni project, researcher Anna-Luna Post sets out to discover…

The Greater Angkor Region in contemporary Cambodia was dramatically more urbanized in the 13th century than previously thought, and home to 700.000 to 900.000 people. These discoveries were made by a research team led by Sarah Klassen. Their findings are published in Science Advances.

The Executive Board is visiting the university’s institutes to find out what is going on. On 8 July 2025, it was the turn of the Institute of Environmental Sciences (CML), one of the fastest-growing institutes at Leiden University. ‘Our main aim is to preserve our planet for future generations.’

Through various initiatives, Leiden University is trying to make people aware of the importance of biodiversity: the cultivation of a wide variety of micro-organisms, animals and plant species. This is important because in the Netherlands biodiversity has declined from about 40 percent in 1900 to about…

PhD student and research journalist Sebastiaan Grosscurt won a Tegel in May. In the data category, Grosscurt and his colleagues won the prestigious Dutch journalism award. 'For me, ecological research and journalism are two ways of achieving the same thing.'

Paul Behrens and his team have won the Frontiers Planet Prize of half a million euros for their research into the effects of switching to a plant-based diet.

By Royal Decree, Mirjam Sombroek van Doorm was appointed as a member of the Health Council of the Netherlands as of 1 January 2024. She has joined the standing committee for Ethics and Law as well as the temporary Brain Injury through Sports Committee. The Health Council of the Netherlands is an independent…

The Sustainability Monitor 2024 reveals that Leiden University has again taken significant steps to become a more sustainable and future-proof university. Since 1990, its carbon emissions have decreased by 50 per cent and, compared with 2019, its natural gas consumption has dropped by 32 per cent. Its…

Mining for natural resources harms the environment. But we desperately need them, for both the development of countries and the transition to a sustainable energy system. Professor of Sustainable Resource Use Ester van der Voet researches how we can reduce the environmental impact of natural resources…

After an extensive content analysis of the coalition agreement, a sharp fall can be seen in the focus on education & culture, science & technology and defence. This is the conclusion of university public administration professors Gerard Breeman and Arco Timmermans. They compared the content with all…

Roel Wouters (24), a biology student at Leiden University, is a finalist in the election for UN youth delegate for Biodiversity and Food. The digital polls open for a week on Friday 22 October. Under-30s can vote for Roel at www.stemroel.nl.

Isaac McKean Scarborough has been working at the Institute for History as a lecturer since September 2021. Below he introduces himself!

On August 30, the online platform Historical Maps of Southeast Asia was launched. The platform provides access to over 1,400 digitised maps of Southeast Asia from the collections of the National Library Board Singapore (307 maps), Beinecke Rare Book and Manuscript Library - Yale University (150 maps),…

The year 2023 saw the earthquake in Turkey and Syria, the Wagner Group rebellion and wildfires and floods as all the weather records were smashed. Our most-read stories were about the climate crisis and the elections: here’s the list.

From a new generation of antibiotics and more-effective vaccines to a map of dark matter and new light on Hindu traditions. Four researchers from Leiden University have received a prestigious €2.5m ERC Advanced Grant to develop their research.

The starting point of human-induced landscape changes has been under permanent debate. It is widely accepted that the emergence of agriculture strongly increased human impact on their environments. However, foragers can and do actively transform land cover and ecosystems. Ethnographic observations,…

Speculation about alien life, a new nitrogen map, AI as a thesis supervisor, groundbreaking telescopes and multi-million-euro investments to combat antimicrobial resistance – the diversity of these topics shows that our readers are just as broadly interested as our researchers. Discover the most-read…

Violent conflicts and civil wars in Chad impede most rural households' access to food security, agricultural activities and access to essential services such as health care. In her dissertation, Nakar Djindil Syntyche denounces this issue. She obtained her PhD on 24 November.

Pita Limjaroenrat (45) was set to become Thailand’s next prime minister, but in 2024 the Thai Constitutional Court dissolved his progressive Move Forward Party and banned him from politics. He now reflects publicly on the policy values that brought the party to prominence.

Europe’s security suddenly looks uncertain now President Trump has started negotiations with Putin. What does this mean for the Netherlands? What do we need to do?

Within a single generation, the digital world has changed completely: from a technical niche for ‘nerds’ to a reality that affects everyone. Cyberattacks, data breaches and system failures can disrupt essential social processes. How can we ensure that our society remains digitally resilient?

The university may seem a bit subdued in the run-up to the Dutch elections on 29 October. The media has barely mentioned education as an election issue, but behind the scenes the university is lobbying hard, says acting President of the Executive Board, Timo Kos. ‘We’re fighting for the future of our…

What started as pioneering work, has evolved over decades to become a renowned institute in 2025 with an internationally acclaimed master's programme. 'Almost everyone involved in the aviation and space sector knows us in Leiden.'

The Faculty of Humanities wants to take a stand in the middle of society with its research and education. That’s why last year, in the middle of a pandemic, the Societal Advisory Board was founded. What are the members’ plans?

The Faculty of Humanities has made a festive start to the academic year. On 7 September, staff members were able to meet each other at a drinks party in the Hortus botanicus.

Over the past year, AI experts across the university have launched initiatives for and with lecturers, students and staff. This is in response to the growing role of AI in society, with its impact and associated risks calling for greater awareness within our sector. All information for lecturers is…

Education, Research

In het jaar voor overlijden door zelfdoding zag een groot deel van de mensen een zorgprofessional. Het optreden van zorgprofessionals is van cruciaal belang om het aantal zelfdodingen in Nederland te verminderen. Daartoe moet de kwaliteit van zorg beter, in het bijzonder voor jongeren, jongvolwassenen…

On November 30, 2023, the research group Institutions for Conflict Resolution (COI) organized a stakeholder meeting on governmental problem-solving and its implications for legitimacy. COI is a joint collaboration between the Universities of Leiden, Utrecht, and Nijmegen as part of the Dutch Sector…

The Security Studies bachelor's programme has received a bronze medal in EW Best Studies 2023. Every year, EW Best Studies selects the top programmes in Dutch higher education.

Carlotta Rigotti, postdoctoral researcher at eLaw, has just published her new monograph, The Regulation of Sex Robots: Gender and Sexuality in the Era of Artificial Intelligence.

The first professional training organised by the Leiden-Delft-Erasmus Centre for Global Heritage and Development has finished. The participants work for municipalities, provinces, universities or are independent researchers or consultants in the Heritage Sector. During three intensive days in September…

Under #TheCode European media report about Martijn Nouwens’s research on the secretive EU Code of Conduct Group which is tasked with tackling harmful tax competition in Europe. The stories expose to the wider public for the first time how this diplomatic high-level working group of EU Member States…

This month, it came out that a subdistrict court judge used ChatGPT to formulate a ruling. The judge included some text generated by the popular AI chatbot in his decision. This resulted in a lot of media commotion, raising doubts as to whether using ChatGPT in court is permissible and responsible.

Assistant Professor Briitta van Staalduinen has received the Best Dissertation Award from the American Political Science Association, Section on Class and Inequality. Her dissertation, Ethnic Inequality in the Welfare State, aims to reconcile the persistence of ethnic inequalities in expansive welfare…

Leiden University College (LUC) is proud to announce that it have been awarded the Special Feature Sustainable Higher Education by the Accreditation Organisation of the Netherlands and Flanders (NVAO). This recognition affirms the deep commitment to embedding sustainability across the curriculum, research,…

Salvador Santino Regilme, Jr. Associate Professor of International Relations and Program Chair of MA in International Relations, has been honored with the Cecil B. Currey Book Award for 2023. The accolade, presented by the Association for Global South Studies (AGSS), recognizes Regilme’s exceptional…

The European Commission sees increased labour migration as a solution to the growing personnel shortages, but the Dutch Labour Inspectorate argues that this is not a tenable business model. Professor of Economics Olaf van Vliet discusses the advantages and disadvantages of labour migration for the economy…

On 28 and 29 May, Carlotta Rigotti, postdoctoral researcher at eLaw, held a workshop on fairness and diversity bias in AI-driven recruitment at the annual symposium of the Japanese Society on Artificial Intelligence (JSAI) in Hamamatsu, Japan. The workshop was organised as part of the BIAS project in…

The Executive Board of Leiden University has appointed Bart Joosen as Professor of Financial Law commencing on 1 July 2023. The chair is attached to the Hazelhoff Centre for Financial Law, part of the Institute of Private Law at Leiden Law School.

The importance of digitalization has become even more evident during the Corona crisis. Society and the Dutch economy are therefore rapidly digitizing. This calls for a good balance between seizing opportunities and reducing risks.

Around 200 scholars from around the world are expected in Leiden to discuss the contribution of courts to societal change. Leiden Law School is hosting the conference.