Leiden researchers have found clues to why a rare pregnancy disorder is mild in some babies but life-threatening in others. Their discovery opens the door to a test that could identify severe cases during pregnancy. Fortunately, a treatment already exists.

Dr Valentina Azzarà, an honorary research fellow at the Faculty of Archaeology and an expert on prehistoric Oman, was recently invited to feature in a National Geographic documentary that aired last year. The opportunity came after a series of discussions and preparations that saw her engage with the…

War and peace studies. A topic that is more relevant than ever because of the war in Ukraine. In September, the MSc Crisis and Security Management (CSM) will start a new track: War and Peace Studies. CSM’s Programme Director, Ernst Dijxhoorn, discusses the new track, how it was created and what students…

Astronomers led by Leiden PhD candidate Richelle van Capelleveen have, for the first time, discovered an exoplanet that has carved a bright gap in the protoplanetary disc around its star. This rare observation provides new insights into how young planets shape their surroundings.

Daniël Vredenberg did his master’s internship at the communications department of the Rijksvastgoedbedrijf. In this interview, he talks about his internship and the difference between actually working at an organisation, as he is currently doing, and doing an internship.

The Honours College Law (HC Law) is soon going to look very different. What does the HC Law currently do, and what’s going to change? Why should you apply for it? To answer these questions, we spoke to Maartje van der Woude, Designated Professor at the HC Law. She’s designing the new programme in collaboration…

Ineke van der Ham has been appointed professor of Technological Innovations in Neuropsychology on 1 January. She researches how virtual reality and games help people navigate better. And this matters, as good navigation skills are about more than coming home safely.

Rich, white, urban: Western politicians often represent a small segment of the population. Political scientist Hélène Landemore advocates for a more inclusive democracy. She will deliver the Cleveringa Lecture on November 26.

Not everything that comes close to a black hole is swallowed by it. Black holes can also hurl material away, and that chance turns out to be considerably bigger than previously thought. Martijn Oei's accidental discovery and his subsequent research on it earned him a cum laude promotion on 12 Decemb…

On Tuesday 30 September 2025, PhD candidate Jonathan Collins will defend his dissertation A Wolf in Sheep’s Clothing: A Mixed-Methods Analysis of the Far-Right Alt-Tech Social Media Movement in Leiden’s Academy Building. His work examines the communication dynamics of far-right communities on alternative…

The Night of Discoveries will take place on 20 September in the area around Hortus botanicus Leiden, the Old Observatory, Pieterkserk, the Academy Building, Old School, the Faculty Club and the PJ Veth Building.

On 30 November 2021 the book 'Audiovisual and Digital Ethnography: A Practical and Theoretical Guide' was published by Routledge. The book resulted from eight anthropologists of the Institute of Cultural Anthropology and Development Sociology joining forces: Cristina Grasseni, Bart Barendregt, Erik…

The Capacity to Innovate is a recently published book by Sarah Giest, Assistant Professor at the Institute of Public Administration. In this article Sarah gives insight in the main findings of the book and the experience developing it.

‘I could hardly believe my ears when I heard that we had been awarded the Gravitation grant,’ says Berna Güroğlu, professor of the Neuroscience of Social Relations. This grant is awarded by the state, via NWO, to pioneering scientific top research. In terms of grants, this really is something special,…

Last academic year, Johan van Wilsem, strategist researcher at the Netherlands Court of Audit, taught the one-off elective ‘Policy Evaluation in Practice’ to students of the Master Crises and Security Management (CSM). A great success, for both students as lecturer Van Wilsem. The course scored 8.8…

In a time of growing polarisation and declining trust, the rule of law is under pressure. The system as we know it today only took shape 177 years ago, with the constitutional reform of 1848. Carla Hoetink emphasises: ‘The democratic rule of law was originally designed to prevent violence and revolu…

Following 40 years of research into the legal equality principle, Emeritus Professor Titia Loenen gave her valedictory lecture in which she took stock of the progress that has been achieved. She focused on equal rights for women and is cautiously optimistic, despite the current rise in conservatism…

Two Second Prizes, two First Prizes and even a Grand Grand First Prize. Five Leiden mathematics students and their team leader have performed exceptionally well during the International Mathematics Competition for University Students 2024 in Bulgaria in early August. This even made for a Dutch recor…

Stephan Raaijmakers has been Professor of Communicative AI since 1 May. Prior to this, he had held this position for five years as professor by special appointment. How has his approach to AI changed in that time?

The Lorentz Center is a melting pot that is visited by researchers from around the world. ‘Miracles happen’ during the five-day interactive workshops at the Center. And there is an extra reason to celebrate the center’s 25th anniversary. On 28 April, the Dutch Research Council (NWO) and Leiden University…

How did early humans use their hands, and what can that tell us about our shared past? Cora Leder, newly awarded recipient of the NWO PhD in the Humanities grant, is set to find out.

A special find has been made in the Alkmaar Regional Archive: a number of 17th-century book bindings contained pieces of parchment from a manuscript from the 11th century. The original manuscript may have belonged to a princess who fled England after the Norman Conquest.

From Soledad Acosta de Samper and Albalucía Angel to Hazel Robinson Abrahams and Amalialú Posso Figueroa. During the Symposium & Workshop Experience and Voice: Library of Colombian Women Writers, we focus on books written by Colombian women writers from different historical periods. The symposium and…

Over hundreds of thousands of years, our region witnessed the comings and goings of various types of hominin. This depended on the temperature as ice ages alternated with warmer periods. In ‘De eerste mensen in de Lage Landen’ (‘The First Humans in the Low Countries’) Leiden archaeologists Yannick Raczynski-Henk…

The cultural linguistic minority group of deaf people who communicate using sign language systematically experiences limited access to fundamental rights. Linguist Joni Oyserman identified this problem and has received a Meijers grant to fund her investigation.

The Ecuadorian Pachakutik party is one of the oldest indigenous political movements in Latin America. Despite not being very successful at the polls and hardly having organisational resources at its disposal, Pachakutik is still part of Ecuador’s political landscape. In her dissertation, Political Scientist…

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.

Researchers have discovered the most distant Milky-Way-like galaxy yet observed. Dubbed REBELS-25, this disc galaxy seems as orderly as present-day galaxies, but we see it as it was when the Universe was only 700 million years old. This is surprising since, according to our current understanding of…

What exactly does it mean when your doctor says you have a ‘good chance’ of survival? Leiden researchers discovered that there is a big difference in how people interpret such probability phrases. And that can be a problem, warns lead researcher Sanne Willems in her blog post.

Does medicine make patients feel better or worse? We are getting better at predicting this from people’s DNA profiles, says Professor Jesse Swen. ‘It never fails to fascinate me how one DNA base pair can have such a huge effect on treatment with medication and the outcome.’

Last semester, bachelor’s students in Religious Studies spent a lot of time in community centres in Leiden. The reason: field research into loneliness in the city.

As part of the course 'Masterclass at the Court of The Hague', twelve law students spent several days at the court with judges, court lawyers and legal advisers over the course of seven weeks. At the final session on 13 March, they presented their experiences.

The Houthis are attacking ships in the Red Sea. Rerouting via South Africa is expensive, whereas the Arctic route only takes a week. Once a no-go zone, this route might be a more realistic option. Mind the nuclear submarines, though…

'You’ll know right away when you meet your true love’ or ‘Opposites attract’: Some persistent beliefs exist about love and attraction, but are they true? Researcher Iliana Samara investigates the dynamics of attraction and explains which love myths we can let go of.

On Monday 26 August, students were warmly welcomed at the Wijnhaven location with a blue carpet and live music. Accompanied by their friends and family, they gathered to receive their BSc Security Studies diploma.

Anne Veens is on a mission. She wants secondary school students to get acquainted with anthropology, and think about the value it can have in the development and implementation of policy. To achieve this, she has developed a teaching package. Last July, she successfully ran the first pilot. 'Most pupils…

How are supermassive black holes born? That is the question astronomer Elena Maria Rossi is trying to answer. But how do you investigate something you cannot see?

Examining cybercrime from criminological, legal, administrative, and technical perspectives. The new Bachelor's programme in Cybersecurity & Cybercrime addresses the growing demand for versatile cyber professionals..

Henk Hoekstra and Alessandra Silvestri work on the astronomy and theoretical physics in the Euclid mission. These Dutch researchers are part of the mission.

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…

50 years ago Lauterbur published the basic principle of MRI. Sine then MRI has become more expensive. Professor Andrew Webb describes what is needed to make MRI available for everybody.

Sandra Palmen studied tax law at Leiden University and built a career within central government, currently as State Secretary. She was one of the first to raise the alarm about the child benefits affair and is now righting the wrongs.

No less than six Leiden projects received a grant for quantum research from the national growth programme Quantum Delta NL and the NWO. After all, in order to boost quantum technology not only industry is needed, but also science. Research towards new sensors, faster algorithms and quantum materials,…

A truly special moment in the Senate Chamber of the Academy Building: the portrait of Professor Judi Mesman has been unveiled. 'Leiden University only reserves places in this chamber for its foremost scholars, and you are certainly one of them,' said Rector Magnificus Hester Bijl.

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PhD defence

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Lecture, Lunch Research Seminar

PhD defence