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…

Proton therapy is a new way of treating cancer in which radiation doses are delivered more precisely. This results in less damage to surrounding tissue and fewer side effects. Professor Marco van Vulpen is medical director of HollandPTC in Delft, where the social value of this therapy is studied. Van…

Prof. dr. ir. Bas Rietjens of the Dutch Defense Academy (NLDA) has been appointed Professor by special appointment Intelligence in War and Conflict at Leiden University’s Institute for Security and Global Affairs (ISGA). The appointment of Rietjens is the result of a more intensive collaboration between…

When politicians claim they can make major differences with their migration policies, they’re raising false expectations. The opportunities for the government to restrict migration are in fact very limited. And what about the little room they do have? Mark Klaassen’s advice is to make use of those opportunities…

Have you considered including the Leiden University Fund in your will?

In October 2024, we launched GROW, the conversations (Conversations about Results, Development, and Well-being). It's time to ask for initial impressions within the organisation. I spoke about this with Mirjam van den Brand, Institute Manager of LUC. She is positive about GROW: 'It's transparent,…

IAt the Criminal Justice Public Lecture on 20 April, Professor of Law and Society Maartje van der Woude spoke about her research into decisions and practice in relation to intra-Schengen border areas and the free movement of persons. The thinking behind the Schengen area is that where the external borders…

ICT, Security

In April 2025, Ms. Esther Rachow from The Hebrew University in Jerusalem presenting her ongoing doctoral research at an Austria Centre Leiden lunch-time talk. She answered a few questions about her visit below.

An incredible quantity of archaeological reports are stored in digital archives. If you want to search for information in them, you have to do this manually. And that is a real chore. Archaeologist Alex Brandsen has now used deep learning, a form of artificial intelligence, to develop a search engine…

Botanisch filosoof Norbert Peeters vertelt over hoe mensen omgaan met planten in het algemeen, en met onkruid in het bijzonder.

New Report Launched by ACPF with the support of the Department of Child Law and Health Law

Psychologist Hilmar Zech found that overweight people are actually more attracted to food pictures after eating than before. He did so using an old research method that he revamped for use on smartphones. Zech will defend his PhD on 30 April.

Is it possible to measure subtle oscillations caused by dark matter moving through the earth? A Dutch-American physicist team have discovered a new route toward what could be the first-ever measurement of ultralight dark matter. They suspended a microscopic magnet inside a superconducting enclosure,…

Pandemics, terrorist attacks, environmental disasters... These are real threats, which we cannot ignore. In fact: we need to prepare better for the large-scale crises of the future. Preferably in a way that suits our lifestyle and respects our social values. Over the next ten years, an interdisciplinary…

Martin van Hecke and Lennard Kwakernaak (Leiden university and AMOLF) develop a mechanical metamterial that can count to ten in their research.

In 2022, Leiden will be the European City of Science. The preparations are in full swing, so we would like to give you a look behind the scenes. This time we talk to Ewine van Dishoeck. She is the driving force behind the annual programme at the Faculty of Science. As far as she is concerned, there…

When do you submit a thesis proposal to the Ethics Committee? And how do you ensure that students save their data properly? On 9 June, thesis supervisors will be able to ask these questions at the Ethics Education Afternoon. Professor Herman Paul and policy officer Marcel Belderbos will tell us more…

As of 1 July, toxicologist Mirjam Luijten from the Dutch National Institute for Public Health and the Environment (RIVM) starts as professor by special appointment at the Leiden Academic Centre for Drug Research (LACDR).

The chance that it will do so is about zero, but Russia is legally obliged to investigate violations of law during the war in Ukraine. States that enter into an armed conflict often deny liability, but under international humanitarian law and human rights they are obliged to investigate their military…

Life returned to something resembling normal after Covid but other crises soon took its place. These great challenges are also being felt at the University and our researchers are working on solutions. The nitrogen crisis, problems with young people’s services and an increasingly urgent climate crisis:…

The University's CO2 footprint has once again decreased. This is the conclusion of the 2022 Sustainability Report. The report also concludes that steps have been taken to integrate sustainability into Leiden University education and research.

How can you increase the effectiveness of inspectors using responsible artificial intelligence (AI)? This is the question the Innovation Center for Artificial Intelligence (ICAI) Lab AI4Oversight is tackling. By developing algorithms and methods, they try to provide optimal support for, for example,…

With the aid of physics and a minuscule magnet, researchers have discovered a new structure of telomeric DNA. Telomeres are sometimes seen as the key to living longer. They protect genes from damage but get a bit shorter each time a cell divides. If they become too short, the cell dies. The new discovery…

Tjerk Oosterkamp's group is conducting what is perhaps the coldest research in the world. The researchers have cooled a sensor to below 2 millikelvin - almost as cold as absolute zero. This allows them to make extremely sensitive measurements. PhD candidate Jaimy Plugge helped build the setup: ‘We are…

What is the state of democracy in developing and transition countries in 2024? Terrible, according to the BTI Transformation Index.

Last Friday, more than a dozen people died during the storming of Spain’s North African enclave of Melilla. A dramatic incident, but certainly not the first time that refugees and migrants have used force to try to enter Melilla.

Police, administrators and other parties will from now on have access to the advice of the new Academic Advisory Board for the Police. Maartje van der Woude, professor of socio-legal studies, is one of the members of this council.

On 26 September 2023, Carlotta Rigotti was invited to give a talk on the regulatory impact of the AI Act on AI applications for recruitment and selection, during the AI Lund Fika-to-Fika Workshop on Regulating High Risk AI in the EU.

Simone van der Hof, professor of Law and Digital Technology at eLaw, has joined the EU Special Group on Code of Conduct for age-appropriate design as an expert.

Per 1 september 2021 is de stad Leiden een heuse stadscriminoloog rijker. Marianne Franken gaat in een vier jaar durend promotieproject onderzoek doen naar de veiligheidsbeleving van Leidse burgers.

Tjerk Oosterkamp of the Leiden Institute of Physics managed to do the first-ever measurement of gravity on a tiny particle - just 0.43 milligrams - where the quantum regime starts. He explains in Physics World why this is so challenging.

On 30 June, the Center for Law and Digital Technologies of Leiden University (eLaw) will hold the annual Hans Franken Lecture. This year, the lecture will be held by Jan Kleijssen, the recently retired human rights director at the Council of Europe. The title of the lecture is: 'AI and Human Rights'…

Organisation

Na Shell en Unilever is DSM het derde grote bedrijf dat vertrekt uit Nederland. Fiscalisten zijn niet verbaasd: het sentiment over het vestigingsklimaat hier is momenteel minder gunstig.

Australia wants to introduce a law that makes it possible to demand the identity of anonymous internet trolls. Is this be conceivable in the Netherlands?

In Europe, citizens have a right of access to government information. The European Commission, however, has various methods to prevent this. For example, destroying all e-mails, invoking state security and protection of privacy, and not taking minutes. As a result, it is almost impossible to review…

Koen de Ceuster, university lecturer for Korea Studies at the Leiden University Institute for Area Studies, was interviewed on the NKNews Podcast about art in North Korea. He speaks about the role of art in North Korean society, art ‘business’, and argues why it is not possible to separate propaganda…

President Zelensky of Ukraine has asked the UN International Court of Justice to issue an urgent order to stop Russian military activity in his country. According to Zelensky, Russia has twisted the concept of genocide to justify aggression.

Beneath the glittering surface image of K-pop idols lies the Dorian Grey-like heart of an industry that abuses and discards its trainees and stars. It is a system of absolute power, that will be unable to uphold its image of a positive global influence. According to Aleydis Nissen, researcher at Leiden…

Organisation

This March, Jara Bouma, Cas van der Horst and Laura Heitman from the Division of Drug Discovery and Safety and Laura de Paus, Richard van den Berg, Anthe Janssen and Mario van der Stelt from the LIC joined forces to determine how some drugs can specifically target the cannabinoid CB2 receptor (CB2R)…

It was hot. It was sweaty. Despite the hot summer weather, colleagues showed top performances at the dodgeball tournament on 20 June, organised by Roy de Kleijn. It was an afternoon full of quick dodges, unexpected throws and a good barbecue.

At the International Federation of Classification Societies (IFCS) conference 2022 in Porto, psychologists Tom Wilderjans, Jeffrey Durieux and Julian Rossbroich won the IFCS Cluster Benchmarking Challenge. They wrote the best paper on benchmarking and were awarded with an official plaque and book voucher…

In a new Social Europe article, Salvador Santino Regilme, Associate Professor of International Relations at Leiden University, warns that the EU must radically rethink how it funds its security—before it is too late.

Martin Berger was asked by the FIFA Museum in Zürich to help develop an exposition on the origins of football. In line with his expertise, he worked on the part of the online exposition that was about the Mesoamerican ballgame.

Climate change affects our wellbeing in many ways. In The Conversation, Inge Schrijver, Paul Behrens and Rutger Hoekstra of the CML describe how this is hardly taken into account in the climate models on which global policy is based.

Conference

If you want to travel for work to an area with a security risk country or area with the color code orange and/or red, you need prior permission from the university.

Dutch troops, judges and politicians collectively condoned and concealed the systematic use of extreme violence during the Indonesian War of Independence. Historians have now shown how this could happen. ‘It was scandal management rather than prevention,’ says Leiden historian and research leader Gert…