On 9 February 2026, Bastiaan Rijpkema, Professor of Jurisprudence, was elected as a member of the Royal Holland Society of Sciences and Humanities (KHMW).

On 9 February 2026, Bastiaan Rijpkema, Professor of Jurisprudence, was appointed as a member of the Royal Holland Society of Sciences and Humanities (KHMW).

Always taking the same route to work, going for that one dish in restaurants and going on the same holiday each summer: this may ring a bell for those who don’t like uncertainty. Researchers are now discovering that this aversion affects how we understand the world.

Dutch mosquitos are more resilient to saltwater than previously thought. Environmental scientist Sam Boerlijst discovered this during his PhD research at the Hortus botanicus. This knowledge is crucial for understanding how mosquito-borne disease transmission might change in the future.

Have you experienced or witnessed unacceptable or transgressive behaviour? This page gives information about what you can do yourself and which ‘helplines’ can assist you in this situation.

Academics are increasingly facing threats, harassment and hate speech following public appearances. The Dutch universities – united in the Association of Universities in the Netherlands (VSNU) – is now adopting a number of national measures, from a zero-tolerance policty to psychosocial help for vic…

His article on ‘the War on Drugs’ in Colombia and the Philippines has been in the top five most downloaded articles of Oxford University Press for some time. Now, Assistant Professor Santino Regilme is to receive a NIAS grant to map out the global war on drugs.

...What does seem clear, though, is that there is a great deal of room for improvement in the process of out-of-home placement. The FSW's social and behavioural scientists give their views.

There is a lot of discussion about international students and Dutch universities. The Cultural Anthropology and Sociology of Development programme is an international bachelor's programme. Forty per cent of our students come from outside the Netherlands. We ask five students how they feel about studying…

Academics increasingly face threats, intimidation and abuse. The WetenschapVeilig platform has been launched to address this. Academics who are being threatened or intimidated can seek help from the platform 24 hours a day. It’s good that we now have this platform. But at the same time, it’s awful that…

The study, made possible through funding from the Hersenstichting, is led by neurologist Brigit de Jong, in collaboration with psychiatrist Sonja Rutten, Karin van der Hiele and Aglaia Zedlitz. Other partners include University Medical Center Groningen, Klimmendaal Rehabilitation Centre and Amsterdam…

The Health Council of the Netherlands has published an advisory report entitled ‘Ethische en juridische overwegingen Covid-19’ (Covid-19: ethical and legal considerations). According to the Council, businesses and organisations may request a vaccination certificate, but can only do so under strict c…

Divakar Budda

In its ruling this week, The Hague Court of Appeal made short work of how the Dutch Border Police allow the colour of a person’s skin to be taken into account when selecting people to check. According to Maartje van der Woude, this ruling reaches far beyond the border police. ‘This is a problem for…

It is sufficiently plausible that the professor from the Faculty of Archaeology exhibited the ‘inappropriate and unacceptable behaviour’ detailed in the advice of the investigating committee. That is is unless the professor provides counter-evidence. This is the conclusion of the Subdistrict Court…

A new class of polymers has been used in patients for the first time. The compound is the first new drug solubilising agent in decades. Introduced in 2014 by chemist Matthias Barz from Leiden University, it offers a unique alternative to current options.

The Graduate School of the Faculty of Humanities conducted a survey of its PhD candidates and their supervisors in spring 2023. What is going well? And what could be improved? The results are now known.

Het voorstel van D66 om een wetsartikel zo te veranderen dat een politieke partij kan worden verboden, is onverstandig, zegt rechtsfilosoof Bastiaan Rijpkema. Hij spreekt er uitgebreid over tijdens een interview met de Volkskrant. ‘Het is overduidelijk bedoeld om één specifieke partij aan te pakken:…

Lionel Laborie recently joined the Institute for History as a lecturer in Early Modern History (18th Century). He introduces himself.

Editors: Irene Hadiprayitno and Rizal Shidiq (Leiden Institute for Area Studies, Leiden University, the Netherlands)

The third edition of the Krijn Rietveld Memorial Innovation Award was won by Anne Dirkson, former LIACS PhD student. During her PhD she researched the automatic collection of patient experiences from online forums. ‘With this work, Anne has shown how the exchange of knowledge between medical professionals,…

Kohei Suzuki, Assistant Professor at Institute of Public Administration, was interviewed by Infobae about loneliness in Japan and the role of government and society.

Today, 13 May 2024, Leiden University’s Executive Board is publishing the advice of the committee that investigated reports of unacceptable behaviour and breaches of academic integrity. These reports were about a professor from the university and their partner (a former member of the university staf…

In het onderzoek van docent Martijn Nouwen wordt voor het eerst aan het grote publiek blootgelegd hoe de ‘geheime’ Europese Gedragscodegroep er niet in is geslaagd om verschillende vormen van schadelijke belastingconcurrentie uit te bannen.

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

All persons making use of Leiden University buildings and grounds must comply with the general University house rules. These are listed in the Regulations on the Use of University Buildings, Grounds and Other Facilities, and are intended to guarantee order and safety for guests and staff alike.

Revelations about unacceptable behaviour and sexual misconduct in the TV and sporting world have rekindled the public debate about a safe environment. At Leiden University we are coming together to prevent unacceptable behaviour and provide proper care and support for victims. According to President…

The Faculty Board has decided to introduce a renewed and future proof minor portfolio starting in the 2027 – 2028 academic year. With this updated package, the Faculty aims to offer an attractive and academically strong selection of minors that aligns with current themes, societal developments, labour…

When a bacterium becomes more resistant to one antibiotic, it sometimes becomes more sensitive to another. To better understand this interaction, researchers from the Leiden Institute of Biology (IBL) and the Leiden Academic Center for Drug Research (LACDR) under supervision of Daniel Rozen and Coen…

Jianfeng Ge and Milan Allen of Leiden University look for majorana quasiparticles using shot noise measurements

Like many others, we were horrified to learn of the violence that erupted in Israel and Gaza this weekend. It will not have escaped anyone’s notice that fierce fighting has been raging there once again since Saturday. We hope that the hostilities will end soon.

A new treatment for atherosclerosis showed promising results in isolated cells but proved to be less effective in initial animal tests. Bachelor student Biopharmaceutical Sciences Willemijn van der Heijden aimed to understand why. She investigated whether the formation of a protein layer around the…

Can kindness training increase political tolerance? And how can we better support children with selective mutism? During the Health@FSW knowledge market and exchange event on 26 May 2025, researchers from all five institutes showcased how their work aligns with the faculty’s research strategy and contributes…

Is polder rice a feasible circular alternative to cows on peat soil? In May, an experimental trial began, with researchers from Leiden University and Wageningen University & Research (WUR) planting around 3,000 rice plants at the Polderlab near Leiden. The researchers aimed to test rice as a middle…

Leiden University signed the Amnesty International ‘Let’s talk about YES’ manifesto on 10 March, confirming the university’s commitment to preventing sexual violence. Steps will also be taken to make sure that everyone within the university feels responsible for a culture in which sex is based on equality…

Sex and power are closely linked, and this was certainly true in the former Dutch colonies. PhD student Sophie Rose investigated how sexual and love relationships influenced eighteenth-century power structures there. 'You can see that there was constant fighting over who stood where in the social hi…

Fiffy the chimpanzee had rapidly developed cataracts in both eyes that made her as good as blind. Eye doctors at the Leiden University Medical Center (LUMC) have now managed to replace the lenses in both her eyes. As far as we know, Fiffy, who is thought to be between 30 and 40 years old, is the first…

The European Research Council (ERC) has awarded a prestigious Starting Grant to Leiden archaeologist Dr Nathalie Brusgaard. With this €1.5 million grant, Brusgaard will investigate how the transition to farming in Western Europe affected the relationship between humans and wild animals. A theme that,…

Her part-time job as a city guide in Dordrecht opened Lotte Hamm's eyes: not business administration, but history was her dream study. This semester she starts her bachelor's degree.