Professor Ariadne Schmidt and Associate Professor Arie van Steensel (University of Groningen) have produced A Companion to Medieval and Early Modern Leiden, the first English-language history of Leiden. Mayor Peter Heijkoop received the first copy.

Micro- and nanoplastics cause stress to crops such as lettuce and carrots, PhD candidate Laura Julia Zantis found. This can lead to reduced growth and a lower nutritional value. Biodegradable plastics have this effect too, likely because of chemicals they release during degradation.

Would you like to take concrete steps toward a sustainable university or do you have a broad interest in sustainability? Over 200 staff members have already joined the Leiden University Sustainability Network. And there is always room for more – even if you’re no expert on sustainability, says project…

Science Europe has selected CWTS at Leiden University and the Know Center (Graz, Austria) to conduct a study into the links between open science and research cultures.

LUC students research the Geul river’s restoration, combining sediment studies, biodiversity assessments, and policy insights for global environmental challenges

PhD candidate Karen van den Akker has written a children’s book to get young girls excited about technology. The picture book ‘Met mama naar Mars’ tells the story of Luna, who wants to travel to Mars.

The Sustainability Monitor 2023 shows that Leiden University is taking its sustainability efforts seriously.

An international team of astronomers has discovered a large reservoir of hot gas in the cluster-in-formation around the Spiderweb Galaxy. Based partly on that hot gas, the astronomers predict that the cluster-in-formation will grow into one of the largest objects in the universe. A step closer to discovering…

Education, Research

Education, Research

On Saturday 25 June, the Europa Institute of Leiden University hosted the 61st Leiden-London Meeting, an annual event organized jointly by the Europa Institute and the British Institute of International and Comparative Law (BIICL). This year’s meeting had “Interdependence, cooperation and strategic…

A major grant for research into machine learning algorithms for quantum computers. With this ERC Consolidator grant, Vedran Dunjko and his colleagues hope to discover which real-world problems a quantum computer can solve faster than a normal one.

On January 1st Jasper Knoester started as our new dean. How is he finding it? What kinds of things is he doing and what does his day look like? In each newsletter Jasper gives a peek into his life as dean.

Bastiaan Rijpkema has been appointed Professor by special appointment of the new chair Tolerance at the Faculty of Humanities with effect from 1 July 2021. The chair was established by Stichting Leerstoel Uytenbogaert.

New! Participate in vital activities during our Healthy University Let’s Walk Week (March 1-5) and challenge your colleagues in our organization wide walking competition using the Ommetje-app!

Cornald Maas was able to ‘pioneer’ in Leiden. This Dutch Studies graduate, presenter, programme maker and publicist combined an active student life with studying hard.

Nearly 19,000 runners lined up at the start of Leiden Marathon on Sunday, among them students and staff from the university. For some this was their first race, for others a highlight of their year. This year, in celebration of our 450th anniversary, they ran in a special jubilee t-shirt.

Leiden PhD candidate Jo-Anne Verschoor discovered that nearly twenty percent of the bacterial strains she studied could degrade plastic, though they needed some encouragement to do so. ‘Bacteria are just like people,’ says Verschoor. Her research was published in the journal Communications Biology,…

Leiden University is publishing a list giving an overview of its research collaborations with the fossil fuel industry.

Wat zie jij als je verderkijkt? Hoe ziet studeren aan de Universiteit Leiden in 2075 eruit? We nodigen je uit om mee te doen met Verderkijkers.

It’s time to announce a major development within the teaching and education we provide at our faculty: the launch of the Atelier pilot! Atelier will be a new teaching format within the bachelor’s programme in Law. The pilot will be conducted in the 2024-2025 academic year during the third block of the…

Before researchers can develop targeted drugs, they need to know exactly how a disease works. Biochemist Bert Beerkens created molecules that allow them to find out. He used caffeine as the basis for new molecules that enable research into certain receptor proteins on cells.

Not all gay and lesbian students feel equally safe at their sports clubs. ‘Homo’ is used almost unthinkingly as a term of abuse and players often face homophobic comments. What can sports clubs and teams do to make sure everyone feels safe when playing sports?

Watching and analysing hundreds of TEDx talks, that too can be research. That becomes clear from the work of PhD student Aletta Meinsma, who is studying potential problems in popular communication about quantum technologies. She explains how she approaches this and why it is so important.

A bacterium hiding from the immune system and picking up bits of DNA from its environment. The result: gaining new traits, such as better protection against antibiotics. Fortunately, we have not found such a damning scenario yet. However, PhD student Renée Kapteijn did find the first clues, which…

The Grotius Centre for International Legal Studies is proud to announce a fortified partnership with the International Bar Association to annually stage the largest moot competition focused on international criminal law: The International Criminal Court Moot Court Competition.

The ROBUST consortium, which is the initiative of the Innovation Center for Artificial intelligence (ICAI), has received 25 million euros from the Dutch Research Council (NWO) to strengthen fundamental AI research.

Professor Jan Melissen (ISGA) is the recipient of the 2022 ISA Distinguished Scholar Award in Diplomacy Studies. It is the first time this prize has been awarded to someone in Europe. Melissen: ‘I am very honoured and humbled to be the first person to receive this award outside North America.’

Astronomers led by Simon Portegies Zwart used simulations to reconstruct how three stars were ejected from the star cluster R136, 60,000 years ago. The analysis reveals that five stars were involved in the event in the Tarantula Nebula.

How do you go about the sustainable restoration of a nineteenth-century ship without affecting its historical worth? Leiden University students from the master’s programme in Industrial Ecology spent six months working on this question. We spoke to Hidde Boom (25) and Tycho Jongenelen (25), two of the…

During his bachelor's programme in International Studies, Tom de Groot became fascinated by the theme of peace and security. Now he designs and moderates training courses to help professionals develop further in this field.

A consortium, led by Erik de Maaker (CADS, Leiden), has under the NWA scheme (Dutch National Science agenda) been awarded 98k€ for Localizing Global Garment Biographies, a two-year project to research the different ways by which users and producers attach value to garments.

In its new Annual Report 2023, Leiden University reviews its research and teaching, as well as its ICT, staffing, finances, real estate, impact and knowledge transfer.

On 15 April, our much-beloved and highly respected former colleague Dr Hans Brussee passed away from cancer. In January 2025, Hans began experiencing neck pain. Initially, it appeared to be a herniated disc, but sadly, the diagnosis was soon revised, and his condition proved untreatable. Hans was 77…

Organisation

The energy transition is already a huge challenge for society, but sustainable use of resources is even more complicated. Yet it is at least as urgent. Ester van der Voet has been working on it for decades, for example within the United Nations. Since February, she is a professor at the Centre for Environmental…

On January 1st Jasper Knoester started as our new dean. How is he finding it? What kinds of things is he doing and what does his day look like? In each newsletter Jasper gives a peek into his life as dean.

This month the University and several partners signed the rental contract for the brand-new Spui building. What will this location mean for the future of Campus The Hague, Leiden University and the population of The Hague? Martijn Ridderbos explains in his column.

Cryogenic memories, antibiotic treatment for urinary tract infections and recycling plastic sustainably. These are the subjects of the three NWO-XS grants awarded to Leiden Science researchers.

Are you thinking of applying for a Kiem grant but still tinkering with your idea for an interdisciplinary project? Let your Leiden colleagues inspire you! Dario Fazzi successfully applied for a Kiem grant with his workshop ‘Understanding the threat of the Anthropocene’.

As of 1 September, archaeologist Amanda Henry has been appointed Full Professor at the Faculty of Archaeology, where she will hold the chair in Evolution in Hominin Diets. The appointment marks a new chapter in her academic journey, building on her longstanding research into ancient human diets and…

University lecturer in Management & Organisation Sarita Koendjbiharie is a welcome lecturer on The Hague campus, and not only because she takes a genuine interest in her students. In fact, Koendjbiharie brings her dog Coco to campus whenever she can.

Since September, Jelle Oonk has been the chair of the Science Faculty Council. Jelle is a third-year student, combining Physics and Astronomy studies with this responsible role. Time to get to know him better. Five questions for the new chair.

Every week, Uwe Hensch walks past the Old Observatory in Leiden. In corona times, he decided to make a LEGO design of the historic building. His design is now finished and might go into production. You can help to make it happen.

Oud-studenten gingen op 30 augustus weer de collegezalen in om hun vaste plekje op de banken op te zoeken tijdens Leiden Revisited. Bezoekers konden genieten van inspirerende lezingen, maar ook van een gezellige borrel, buffet, en livemuziek.

Without scientific knowledge, we won’t be able to tackle the grand challenges of the 21st century: climate change, energy transition, social inequality and coronavirus, for example. Professor by Special Appointment of the Social Value of Science Laurens Hessels is therefore calling for more transdisciplinary…

Working for a social client during your studies: this is what happens at Urban Studies. For the course Urban Studies in Practice, third-year students carry out projects for public clients, such as the municipality of The Hague.

Many of us love music, but we don’t understand why exactly that is – or how our individual experiences of music can differ. Rebecca Schaefer will research this in the run-up to the SNAAR Festival in Utrecht. And in a unique way: students in vocational education (mbo) will be the researchers.

Nienke van der Marel has been awarded the New Horizons Prize in physics for her pioneering research on planet formation. This prize is given to young, promising researchers in physics or mathematics. The astronomer and her colleagues found the first observational evidence for 'dust traps' in disks around…

Leiden University will continue to offer its BA in Italian Language and Culture. The Board of the Faculty of Humanities has reversed its decision to stop admitting new students as of the 2026/2027 academic year.