With his clever measuring methods Ignas Snellen – together with his team – was the first to detect carbon monoxide in the atmosphere of exoplanets. For his pioneering work the Leiden astrophysicist has been awarded the Spinoza Prize, the highest academic honour in the Netherlands. The prize of 2.5 million…

Jasper Knoester is the dean of the Faculty of Science. How is he doing, what exactly does he do and what does his day look like? In each newsletter, Jasper gives an insight into his life.

Hans Ulrich Scherer is Professor of Rheumatology, in particular Translational Rheumatology. He wants to build bridges between research and clinical practice and between departments and organisations at home and abroad. Scherer will give his inaugural lecture next Friday. ‘To make progress, we have to…

Jasper Knoester is the dean of the Faculty of Science. How is he doing, what exactly does he do and what does his day look like? In each newsletter, Jasper gives an insight into his life.

Leiden patriot Pieter Vreede fought for greater popular influence. Historian Dirk Alkemade reveals how this pioneer used radical means to shape Dutch democracy.

Hydropower plants need not be disastrous for fishermen and nature. For that, we need to place new dams more strategically, but also modify or even remove some existing ones. Valerio Barbarossa and Rafael Schmitt showed that with a computer model of the Asian Mekong basin.

During his PhD research, mathematician Tyron Lardy worked on a new approach to hypothesis testing. Instead of the traditional p-value, he uses so-called e-values. These turn out to be more flexible – especially when you want to look at your results midway through the study.

How can social scientists contribute to a healthier society? That question was central to the Healthy Society Event on 9 June 2022, which successfully marked the start of a more conscious and intensive collaboration between the five Institutes of the Faculty of Social and Behavioural Sciences on education…

After the May elections a new University Council has now taken seat. The university democracy is the result of the long-lived national student protests in 1969. Students from Leiden joined the protests for greater representation, although their actions were less revolutionary than at other universities.…

Why does a medicine work well for one person, but cause side effects in another? Research by Laura de Jong shows that it’s not just our DNA that matters – other medicines and illnesses can also affect how our bodies respond.

How you think about yourself is important for the choices you make. Adolescents are faced with choosing a study programme that will determine their future, while their self-image is still under development. Tough choice? Research by psychologist Laura van der Aar has shown that taking a training course…

The university is launching a campaign to focus extra attention on our smoke-free university locations. The University is using aptly named cigarette barrels to try to show clearly just how many cigarette filters are being saved from the environment. How harmful are these cigarette filters to the e…

We are pleased to invite paper proposals for the 1.5-day interdisciplinary workshop: “Who rules over migrants? Autocratic elements in migration policies”, that will take place at the University of Leiden on 14 and 15 November 2024.

Minister Dijkgraaf van onderwijs wil het aantal internationale studenten terugdringen. Maar mag Nederland dat wel? En zo ja, is het ook wenselijk? Deze vragen behandelde Mark Klaassen, universitair docent bij het Europa Instituut, tijdens de slotbijeenkomst van het Honours College Law op 12 juni.

A special type of mirror to reflect X-rays has more possible applications than space research. Targeted radiation therapy for cancer, for example. Next to his full-time job, physicist David Girou mapped out the possibilities. He will receive his PhD on 14 June.

Karwan Fatah-Black and Lauren Lauret are co-authors of Geketend voor Hollands Glorie (The Chains of Holland’s Glory) that studies the political and economic connections between South Holland and slavery. The findings of this research will be presented with Dr. Joris van den Tol (Radboud University)…

Aya Ezawa bade farewell as Diversity Officer of Leiden University at a celebration in the Academy Building on 11 June. Since her appointment in 2019, she has been a tireless advocate for culture change and a champion for diversity, inclusion and equal opportunities for all.

The team from Universidad de los Andes (Bogotá, Colombia) came out on top at the international online Moot Court organised by Leiden University and law firm Baker McKenzie.

Smiling faces, sweltering heat and a record-breaking donation – that was the Leiden Science Run 2025. On Saturday 21 June, the Leiden Bio Science Park turned bright orange as enthusiastic runners completed 4.5 kilometres to support research for vulnerable children.

Poland votes for a new president in a first round of elections on Sunday. Lecturer Jan Meijer points out: ‘The result will have a lot of impact on Donald Tusk's liberal government and its plans for reforms.’

A microscope with incredible sharpness that leaves samples unharmed – Guido Stam helped develop one. During his PhD research, he combined light and electrons to study biological samples. ‘We can now measure things that simply weren’t possible before.’

Since 2023, Andrea Evers has been the lead for “Health and well-being in a healthy society”, a key theme at FSW and one of the profile areas of the University as a whole. Three new FSW health research themes will shortly be announced at the Faculty’s Health Research Event, where the FSW’s researchers…

Our institute is in full swing: the annual staffing review, Recognition & Rewards, Open Science and the introduction of GROW. Besides these positive developments, Hanneke Hulst also sees concerns, for example about the new outline agreement. 'I’m hopeful that together we will find smart ways to deal…

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.

A sunny call from Fiji, a drenched arrival in Leiden and a day filled with conversations about cancer research, China and inclusion. Such are the turns a day can take — from itchy legs to a well-earned dessert.

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.

With a full auditorium at the university's Wijnhaven campus, an extensive programme, inspiring speakers and visitors from a wide range of disciplines, all the ingredients were in place for a successful second edition of the Nacht van de Digitale Veiligheid of Digital Security on 26 May 2026.

European Commissioner Ekaterina Zaharieva (Startups, Research and Innovation) visited the Leiden Bio Science Park on 12 June to see how the Leiden life science & health ecosystem works.

In zijn boek 'Chasing Events' onderzoekt Thijs van Dooremalen hoe we de impact van ingrijpende gebeurtenissen echt kunnen begrijpen. Hij laat zien dat traditionele vergelijkingen tekortschieten en pleit voor een nieuwe manier om de effecten van 'events' op lange termijn te analyseren.

Eline Westra recently joined the Institute for History as a postdoctoral researcher in the NWA-funded project 'Dilemmas of Doing Diversity', under the supervision of Marlou Schrover. Below, she introduces herself.

Leiden Law Cast is a podcast made by Leiden Law School, Leiden University, for everyone who wants to learn more about current legal issues.

We had more than 20 participants from all parts of the faculty participating in one of 4 sessions at the end of May and early June. It became evident from the discussions that there are many things that the faculty can and should work on in order to foster an inclusive and safe work environment where…

On 24 June, members of the Executive Board, unit chairs, department heads and education and research coordinators gathered to strengthen the basis for collaboration within the institute. This included discussions on how we can better organise ourselves, and what clear agreements we can make to deal…

On Wednesday, 30 August 2023, the graduation ceremony took place in Leiden University’s Academy Building. The ceremony was a momentous occasion, attended by distinguished guests, faculty members, and the proud families and friends of the graduates. The event celebrated the hard work, dedication, and…

Nowadays they can cause the fall of ministers, but once upon a time receipts were a new phenomenon. Associate Professor Robert Stein is to receive a grant from NIAS to map their origins.

Eastern and Southern European countries struggle with ‘brain drain’ as skilled workers move to other EU Member States. Could restricting free movement be a legitimate and lawful way to address this trend? Researcher Martijn van den Brink will investigate the issue.

A European team of astronomers, led by Leiden-based researcher Konstantinos Migkas, has uncovered a large filament — a long, thread-like structure — of hot gas connecting four clusters of galaxies. This filament is made up of what scientists call the warm-hot intergalactic medium.

Words originally intended to indicate space, such as ‘out’, are also regularly used to indicate cause and effect. Why does this happen? And how does it work in other languages? PhD candidate Camil Staps decided to find out.

At a celebratory event, 25 Leiden University projects received a Kiem grant of up to €10,000 for an interdisciplinary research or education initiative. The grant was in demand, as no fewer than 91 projects applied this year.

Jus post bellum, the body of laws and norms governing the transition from armed conflict to peace, has emerged as a crucial issue for international law scholars, governments, and all concerned with building a just and sustainable peace. The Jus Post Bellum Project, funded by the NWO and hosted by the…

Help us develop and expand the recently established Leiden Chinese Queer Collection (LCQC, 莱顿华语酷儿文献收藏) at Leiden University Libraries (UBL).

The Teaching Fair is coming up again. On Thursday afternoon, 20 June, you can let your colleagues inspire you about innovation in teaching Lecturer Eline Sikkema will be at the information fair with her project on authentic teaching materials.

De Advanced Grant wordt jaarlijks door de European Research Council (ERC) toegekend. Dit jaar krijgen 2 onderzoekers van FSW deze beurs.

Time really does fly: it’s one year since the Student Living Room was officially opened! Masterminded by the Student Support team, this initiative soon took centre stage as the place for students to come together, relax and enjoy a well-earned break from their studies.

Herman Paul (professor of History of the Humanities) has been elected a member of the Royal Netherlands Academy of Arts and Sciences (KNAW). He will be officially installed on 30 September.

On January 28 and 29, 2021 the conference ‘Imperial Artefacts: History, Law and the Looting of Cultural Property’ took place online. This first of its kind event at Leiden University was an interdisciplinary online conference and brought together (post-)colonial historians, legal historians, curators,…

Doctoral Grant for lecturer to research witness protection at the international courts.

Within her research, Janna Marie Bas-Hoogendam covers multiple fields of study, like psychology and psychiatry. For this interdisciplinary work she will receive a major private science prize from the Foundation for Interdisciplinary Behavioural Research (SIGO). Why does the Leiden neuroscientist think…

Leiden University is taking a major step forward in the energy transition with the expansion of the thermal energy storage (TES) in the Gorlaeus Building. This expansion is needed to be able to heat and cool all the new and renovated buildings on the Campus Square of the Faculty of Science sustainably.…

Anne-Laura van Harmelen has received a Vidi grant from the Dutch Research Council (NWO). This talent programme will enable Van Harmelen to research the social and neurobiological mechanisms of resilience in young people with childhood trauma.