Democracy may lead to more deforestation in the tropics. So write environmental scientist Joeri Morpurgo and his colleagues in the prominent scientific journal Biological conservation. They found that competitive elections are associated with more loss of tropical rainforest than elections without competition.…

It matters a lot whether a fatwa is given by a female or male Islamic scholar, discovered doctoral student Nor Ismah.

Exploring the minds of our primate cousins in the wild, using under-exploited observations of their travel paths. A large set of observations of the travel paths of wild primates provides new opportunities for in-depth insights in the evolution of the mental abilities that primates, including ourselves,…

Have faith in others, embrace conflict and differences, take your time: these are just a few of the tips that emerged during a Leiden symposium on interdisciplinary collaboration on 1 February. A second session will take place on Thursday 14 March.

‘If you want to implement open science, you at least need someone at each faculty who can help researchers to solve practical problems.’ Dorien Huijser spent two years managing the transition to a new working method at the Institute of Psychology’s Brain and Development Research Center.

Cotton is the most widely used natural fibre for clothes. But how polluting are our jeans and shirts actually? Environmental scientist Laura Scherer coordinated an international research project on the impacts of cotton. ‘The purchases of consumers in Europe can contribute to water scarcity in China…

Over the past few years, citizen scientists from the Heritage Quest project have scoured the entire Veluwe and Utrechtse Heuvelrug areas for unknown archaeological heritage. One of the results of this research is that the number of known burial mounds in this area has doubled.

"Climate citizenship” explores how adapting environments to climate change can change the way people interact with each other and with government. It focuses on nature-based or 'green' climate infrastructure projects that make use of natural entities or dynamics. With an ERC grant, anthropologist Andrew…

The World Food Programme, Philips, the European Space Agency. An overwhelming list of organisations that Sarita Koendjbiharie, as founder of the PRINS consultancy programme of International Studies, has managed to recruit. ‘We keep reaching new highs and insights together with our students and organ…

Registering your hypothesis and analysis plan online before starting your study – why should researchers bother? Henk van Steenbergen, a researcher in cognitive psychology, decided to give it a try. 'I used it as an exercise in open science.'

On Thursday 2 December, Nadine Akkerman, Reader in early modern English literature will be a guest in the online book salon of Leiden University Libraries (UBL). Head Curator Garrelt Verhoeven will interview Akkerman about her book Elizabeth Stuart, Queen of Hearts. In her biography, Akkerman describes…

On Friday 16 February 2024, Rudolf E. de Jong passed away unexpectedly in Cairo. Since 2012, he was the director of the Netherlands-Flemish Institute in Cairo (NVIC), which he skillfully managed for 12 years. He was laid to rest in Amsterdam on 27 February. Rudolf was 65.

Leiden University Libraries holds an internationally unique collection of unofficial poetry from China. Produced outside the System over the last fifty years or so, this poetry is hugely influential yet hard to find beyond the informal networks through which it travels. To address this paradox, the…

How can the people of Leiden age as well as possible? And what is needed to reduce health disparities? That is the mission of Leiden Healthy Society Center, a new partnership between the Municipality of Leiden, Leiden University and many other partners in the city.

The US-Israeli strikes on Iran have been welcomed by critics of the regime but have also prompted intense concern. They’ve triggered a dangerous domino effect across the region and beyond. Leiden experts share their insights on the potential consequences.

Rianne Scheerhoorn is a government trainee at the Ministry of Economic Affairs and Climate Policy and the Ministry of Agriculture, Nature and Food Quality. After completing her Bachelor's and Master's degrees in Public Administration, she was sure that the Central Government Traineeship Programme (Rijkstraineesprogramma)…

How do colonialism and historical slavery continue to impact the university today? And what should happen next? Students and staff discussed these questions on 11 March.

AI, data and algorithms are developing at breakneck speed, while legislation inevitably lags behind. But laws and regulations are essential – look no further than the Dutch childcare benefits scandal.

Leiden researchers share their work with a global audience through the international journalistic platform The Conversation. What are the benefits? And how does it work? Two researchers talk about their experiences and why colleagues should consider taking the same step.

Assistant professor Max van Duijn is the new chair of The Young Academy. He aims to support young academics, bring research closer to society and make academia more resilient.

Researchers from Leiden University, University of York, University of Barcelona/IQTCUB/ICREA and The Francis Crick Institute report a new class of experimental compounds that powerfully block influenza viruses. The findings offer a potential new strategy for treating flu infections and preparing for…

Every year, Leiden University hosts the Annie Romein-Verschoor Lecture to mark International Women’s Day. This year, historian Nadia Bouras will speak about academic freedom, class and being a woman in academia. And that is just as relevant to men, says lecturer and organiser Looi van Kessel.

Four years of war in Ukraine have transformed the nature of warfare, with drones, digital defence systems and improvised solutions shaping the battlefield. At a recent symposium, Dutch and Ukrainian experts discussed frontline conditions. What lessons do they see for Europe?

Sociale veiligheid in promotietrajecten staat nationaal en ook bij de Universiteit Leiden hoog op de agenda. Toch blijkt het in de praktijk lastig om structureel ruimte te maken voor dit thema, juist vanwege de complexe en hiërarchische verhoudingen binnen de academische wereld. Tijd om daar wat aan…

PhD candidate Sebastiaan van de Lubben has written live blogs about Leiden politics. But how do you go about covering an event while it unfolds? ‘You don’t have time to think while you’re at it.’ Much proved to be unknown about this relatively new journalistic genre.

Unemployed people often need not only a financial safety net but also a stimulus to look for work. PhD candidate Heike Vethaak researched the effects of incentives used by benefit agencies, such as compelling people to widen their job search.

Natalia Sobrino-Saeb has attended the Nobel Peace Prize award ceremony in Oslo. She was awarded this honour after winning the essay competition of the Nobel Ignitor Fellowship, a programme that seeks to inspire young changemakers around the world – for change can be made by all of us: “You never know…

An image has great powers of persuasion. It is said that ‘a picture is worth more than a thousand words’. But these days, images can easily be manipulated with severe consequences. ‘Perhaps it’s time to reconsider the value we attach to images’, says Elize de Mul, whose PhD thesis deals with ‘digital…

Which law governs the Strait of Hormuz? Under international law, both Iran and the US are expected to comply with the ‘Constitution for the Oceans’. In practice, the situation is more complicated, explains maritime law expert Hilde Woker.

Criminal law can reinforce social inequality. ‘People at the lower end of society are hit harder by criminal law in a range of different ways’, says Professor Marloes van Noorloos. ‘That has to change.’

It is still unclear how the Neanderthals died out. For long, one theory seemed most likely: the emergence of the highly intelligent Homo sapiens, or modern humans. This competition hypothesis is no longer the dominant theory among scientists, research among archaeologists and anthropologists has shown.…

Young people in forensic practice navigate between street culture, digital networks and care; worlds that are increasingly intertwined. This calls for a different way of seeing and acting. Dual PhD candidate Jeffrey Jhanjan explores how professionals can better understand and support these young peo…

Next week, Sara Perlstein will defend her PhD on risk talk: the everyday conversations we have about risks with people close to us. From eating sushi to climbing or smoking, these informal talks shape how we deal with danger in other ways than official health advice does.

The cost-sharing standard (kostendelersnorm) – a regulation affecting recipients of supplementary income for older people, often with a migrant background – may lead to financial and health problems for thousands of people, economists Ernst-Jan de Bruijn and Heike Vethaak have found.

Research conducted by Leiden University shows that when parents adjust their working hours, other parents often follow suit. Understanding how other families balance work and care can help new parents divide tasks more equally after the birth of a child.

Injections can be a source of stress and anxiety for children. The Willem-Alexander Children’s Hospital is exploring ways to improve the experience. Together with illusionist Victor Mids and researchers from Leiden, they have shown that magic can help.

CML grants three Stans Awards each year, for the best student thesis, best PhD paper, and best outreach from the past year. The CML staff nominated students and colleagues and this year’s jury Prof. Martina Vijver & Prof. Willie Peijnenburg made the final decision.

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…

Historian Seran de Leede delved into the life of Lie Alma (1909–1990), the courageous woman from the Dutch province of Drenthe who spoke out against fascism in the 1930s and remains a source of inspiration to this day.

Protest is a human right and an important way to hold the authorities to account. But how does the right to protest relate to academic freedom and the right to education?

The EU aims to combat tax avoidance with a blacklist, but this policy has far reaching consequences for non European countries. It leads to unequal treatment and largely fails to achieve its goals. This is shown by Federica Casano’s PhD research.

Starting in September 2026, Leiden University in The Hague will begin establishing a new Knowledge Centre for Kingdom Relations. In addition to bringing together researchers and developing education on Kingdom relations, the goal is to contribute to the public debate and foster greater mutual understanding…

POPcorner The Hague has become a familiar and trusted space at Leiden University in The Hague. It’s where students meet, find support and work together to build an open and approachable student community.

During a visit, Queen Máxima spoke with researchers about projects exploring climate change, collections and culinary heritage.

Historical geographer Marcel IJsselstijn developed a new approach that improves our understanding of how medieval cities were planned. He hopes it will help archaeologists, urban planners and designers address contemporary challenges.

A clear majority in the UN confirmed that states are obliged to combat climate change. 141 countries voted in favour, 8 against, including the US, Russia and Saudi Arabia. Associate Professor Jason Rudall explains the implications.

For the second time this academic year, Nobel Prize winner Paul Krugman visited The Hague. Addressing a packed lecture theatre in our new Spui building, he spoke to students, staff and professionals about the tension between economic advice and political decision-making.

8 juni is Wereld Oceaan Dag, en de VN roept op tot ‘Herbeelden’: een nieuwe relatie met de oceaan. Hoe werkt dat als de realiteit zo snel verandert? We vragen het universitair docent zeerecht Hilde Woker.

From peace missions and military intervention to climate adaptation and geopolitical competition, students of the Advanced MSc in International Relations and Diplomacy (MIRD) showcased the results of two years of intensive research at the annual Thesis Symposium on 22 May 2026.

From children’s birthday parties to international ambassadors, the Old Observatory attracts a wide range of visitors. Student coordinator Sanne van Beek connects visitors and students, ensuring everyone — from five to sixty-five — learns something about the stars.