Even with state-of-the-art technology, it is almost impossible to see: a cosmic neutrino. Yet scientists have managed to image this particle with a deep-sea telescope. And that could help to better understand our universe. Leiden particle physicists collaborated on this ambitious project, published…

Leiden scientists and companies receive 1.37 million euros to develop technology for the Einstein Telescope. This underground telescope will measure gravitational waves and must therefore be extremely sensitive. To that end, the consortium conducts research on the damping of vibrations at temperatures…

Interest organisations are increasingly taking legal action and that’s a good thing for democracy, says PhD candidate Rowie Stolk. ‘It means that the most vulnerable social groups – including children and refugees, who tend to have a weaker political position – are protected.’

Lydie Cabane, Assistant Professor in Governance of Crises at the Institute for Security and Global Affairs, recently published the book The Government of Disasters. In this book Lydie explores how the South African state bureaucracy reacts to disasters.

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.

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)…

On 1 July – Keti Koti, in the year ahead, our university community will be able to reflect extensively on the history of slavery by engaging in research, education and many other activities.

The Leiden Ranking – Open Edition is completely transparent. The ranking compiled by the CWTS uses open data and publishes the algorithms that are used.

Are magnetic fields older than the first light? And how did they influence the development of our universe right after the Big Bang? Cosmologists from Leiden, Groningen, and Utrecht are now collaborating to investigate this.

How should we address our colonial heritage? And how digital and accessible are our collections? Outgoing State Secretary Fleur Gräper spoke with researchers and heritage specialists about this on 25 January.

In a speech on Keti Koti the Dutch king, Willem-Alexander, apologised on behalf of the royal family for the Netherlands’ historical role in slavery. What is the significance of this?

A ‘world class institute’ with a ‘vibrant atmosphere’, doing research on a continent that is ‘becoming increasingly important’. That is how Annetje Ottow, president of Leiden University’s Executive Board, described the African Studies Centre Leiden (ASCL) on its 75th anniversary celebration on 8 September…

Kenan van de Mieroop recently joined the Institute for History as Assistant Professor. Below, he introduces himself.

What hidden nature is there in our cities and how can we use such organisms? This is what the HiddenBiodiversity project will be exploring over the next four years. The project’s kick-off meeting was held at the Hortus botanicus on Monday 26 September.

At the end of the 7th century something curious occurs in Northwestern Europe. Suddenly, people start burying the dead next to their dwellings instead of in communal cemeteries. Professor Frans Theuws recently published a book on this phenomenon. ‘We wanted to know if the study of these farmyard burials…

It was not light, but its absence that caught Stephanie Noach's attention a few years ago. With her research on darkness in art, she aims to show how darkness can question and sometimes even undermine colonial imagery.

Joop Schaye, Professor of The formation of galaxies, has been elected as a member of the Royal Netherlands Academy of Arts and Sciences (KNAW). He will be officially inaugurated on 29 September.

From March 27 to 31 Byvanck Professor Carrie Vout gave the intensive masterclass Classical Art - Definitions, Politics, Limits. This special lecture series was open to students and PhD candidates in Archaeology and Classics. One of the attendees, Nicky Schreuder, on the class: 'It was a critical and…

The design for the METIS instrument for the Extremely Large Telescope (ELT) is final. The European Southern Observatory (ESO) has given the green light for production of all parts of the instrument. It is the first ELT instrument, designed and to be built under Dutch leadership, to formally pass the…

Four researchers from Leiden University have been awarded prestigious Vici grants the Dutch Research Council (NWO) has announced. The honoured applications are from researchers at the Faculty of Social and Behavioural Sciences, Leiden Observatory, the LUMC and the Faculty of Archaeology.

How do you combine the growth of wind energy with the protection of vulnerable seabirds? With her master’s thesis on this delicate balance, Sofie Hajer won the 2025 Unilever Research Prize. Her work provides new insights into how ecology and policy can strengthen each other.

Lecture, NGL-lezing

Lecture

It was more than twenty years ago that the plan for a Japanese-Dutch dictionary was born. Now it contains over 65,000 words, and completion is tentatively coming into view. Dictionary makers Oscar Veltink and Hetty Geerdink-Verkoren talk about their enthusiasm for this decades-long mammoth task.

Ten Leiden researchers will receive funding of up to 280,000 euros from the Dutch Research Council (NWO). They will use this grant to develop their research ideas in the coming three years.

The Dutch Research Council (NWO) has awarded Vidi grants to Leiden researchers.

Space for open dialogue on historical slavery was created at the Keti Koti Table at Museum De Lakenhal, organised by Leiden University and the Municipality of Leiden. There, just metres away from 17th-century paintings, Leideners shared a ritual meal and spoke about the effects of slavery and our colonial…

The Netherlands returned 478 artefacts to Indonesia and Sri Lanka this week, on the advice of a Dutch committee. Rightly so, says Leiden professor Pieter ter Keurs from the Museums, Collections and Society interdisciplinary research programme. ‘But do make it clear why you are returning something.’

Long into the 19th century, seascapes were considered an expression of patriotism. Artists who painted in a 17th century style were valued more. This tradition stifled innovation in the genre, Cécile Bosman has concluded. She will defend her PhD thesis on 13 October.

An international team of researchers led by astronomers from Leiden University (the Netherlands) has produced the first sharp radio maps of the universe at low frequencies. Thanks to a new calibration technique, they bypassed the disturbances of the Earth's ionosphere. They used the new method to study…

The Pieter de la Court Medal is awarded annually by the Faculty of Social and Behavioural Sciences for an initiative by a student or group of students that, over the last academic year, has made a particular contribution to at least one of the Pieter de la Court themes. This year, this medal has been…

The Epic of Gilgamesh was a lifelong inspiration to artist Harry van Kruiningen. This tale from Mesopotamia about the adventures of Gilgamesh, the legendary king of Uruk, and his friend Enkidu is one of the oldest surviving epics in world literature. Despite its almost 4,000 year age, it still captures…

Five thousand years before the common era (BCE), Proto-Indo-European, the mother of many languages that are spoken today in Europe, Central Asia and South Asia, originated in eastern Europe. PhD candidate Axel Palmér has combined a 175-year-old hypothesis with new techniques to demonstrate how descendants…

It’s starting to become a real Dies Natalis tradition: on 8 February professors from Leiden University teach a class at primary schools in the region. This introduces children to academia and teaches them more about conducting research. ‘Had you expected me to be a woman?’

Every year on or around International Women’s Day on 8 March, Leiden University holds its Annie Romein-Verschoor Lecture. This year’s lecture will be given by Sylvana Simons, MP and leader and parliamentary chair of the BIJ1 party. What does International Women’s Day mean to her and which challenges…

Dr Nathalie Brusgaard both studied and finished her PhD at the Faculty of Archaeology in Leiden. After a few years spreading her wings, she is now back. As the new Assistant Professor in the World Archaeology department, she will continue her research on the relationship between prehistoric humans and…

A TikTok by student Loïs de Jong from Leiden University in which Leiden sparkles as a student city won the final of the Leiden Media Contest on 13 June. According to the jury, the film was ‘the most appealing for today’s generation of current and prospective students – it includes nearly all elements…

The EU Return Directive gives migrants residing unlawfully in the European Union the option to leave voluntarily. This is to avoid detention and forced expulsion. But the directive is too vague and can lead to unfair procedures and even human rights violations, PhD candidate Christian Mommers conclu…

The Institute for Philosophy further expands its knowledge: As of 1 September, Annemie Halsema holds the chair of Wijsgerige antropologie en de grondslagen van het humanisme (Philosophical anthropology and the principles of humanism, ed.). In the coming five years, she will study current societal issues…

Did you get a taste for recording local wildlife with Expeditie Stadsnatuur? Join the higher education BioBlitz and help us discover what is growing, crawling and fluttering on our campuses.

Join this lecture from professor Daniel Aldrich at the Spanish Steps in Wijnhaven on Wednesday 3 November. Dr. Sanneke Kuipers, associate professor in Crisis Governance, will be the moderator of the lecture and she and professor Aldrich give us a preview of the event.

Professor Nira Wickramasinghe has won the American Historical Association John F. Richards Prize in South Asian History for her book Slave in a Palanquin. Colonial Servitude and Resistance in Sri Lanka' (Columbia University Press: New York 2020).

No less than four Leiden research teams have been awarded a grant by NWO. On 27 July NWO honoured 21 applications in the Open Competition ENW-XL. NWO awards the grants to consortia in the exact and natural sciences who are doing unconnected fundamental research that is 'driven by curiosity'.

Take a walk through any city, and you are likely to come across a brightly coloured mural. Although these paintings often seem to serve solely as a backdrop for Instagram snapshots, art history professor Minna Valjakka says there are rich traditions and intricate histories that uncover more critical…

How do you manage a crisis? This is what Professor of Crisis Governance Sanneke Kuipers will address in her inaugural lecture.

For the first time, we’re seeing what Euclid sees. The telescope’s initial observations have provided a wealth of new information about our universe. But according to cosmologist Alessandra Silvestri, this is just the beginning. The research helps us gain a deeper understanding of the past, present,…

How do galaxies form? That is what astronomer Mariska Kriek will be researching in the coming years. She received an NWO Vici grant of 1.5 million euros to study galaxies in the early universe. ‘This research uses new and unprecedented observations from the James Webb Space Telescope (JWST). These allow…

Rodrigo Ochigame’s project explores how AI redefines scientific evidence, aiming to help scientists critically navigate these transformations with the Veni grant.