Jasper Knoester is the dean of the Faculty of Science. How is he doing? 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.

After 14 years of chairing the Faculty Council, Associate Professor Jan Sleutels is handing over the baton. Student Susan van Grol takes over the chairmanship. Time for an introduction to Susan.

Astronomer Joseph Callingham and his team have observed for the first time a clear signal from a giant burst from a star outside our solar system. This would have a devastating impact on any unfortunate planet orbiting the star.

Two Cleveringa books from Theo ten Kate's law library were donated to Leiden University by grandson Sebastiaan ten Kate on 24 November. They are the dissertations of W. Hugenholtz and J.G.L Röder, both PhD students of Rudolph Cleveringa. Ten Kate: 'The University is the right place for the books. Here,…

In 2024, the Herta Mohr building was brought into use. The Faculty Office was the first group to be housed in the new building. Towards the end of 2024, a workplace satisfaction survey was conducted among these staff members. With the relocation of LIAS to Herta Mohr in September 2024, the building…

The student navigator 'Find your way' helps students find their way around the university. Student advisers can also be found on the roadmap. JanPieter, student advisor at the Institute of Security and Global Affairs (ISGA), explains what a student advisor does.

Leiden University is a fantastic example of a network university: we create an impact with the city, stakeholders and regional and international partners. The lines of communication are really short and there is a great sense of togetherness. Our good relations with the city have also informed how we…

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.

Too expensive groceries, diseases suddenly breaking out: from the sixteenth to the nineteenth century, hundreds of people documented the world around them in chronicles. A significant number of these texts have been digitised in recent years. Professor of Early Modern Dutch History and project leader…

Most young alumni who graduated during the COVID-19 pandemic did not get a graduation ceremony, nor did they have the chance to sign their name in the Sweat Room. Thanks to the Alumni Office, they now have the chance to do so after all.

What actually goes into the development of a massive open online course, a MOOC? University lecturer Tijmen Pronk developed the course 'Introduction to Comparative Linguistics of Indo-European Languages' independently. He talks about his motivation and experiences.

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…

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…

For years, the late professor Marten Durieux personally mentored and funded students from Sudan to study physics in the Netherlands. Colleague Sense Jan van der Molen calls his endeavour remarkable: ‘Marten Durieux has done a great job with these students, at a time when diversity was not yet a big…

The academic year has kicked off—and how! On 2 September, Dr. Yves Menheere opened our year with a lecture on “The What and Why of Chinese Religions”. For keen listeners, this immediately raised the big question: which concepts should we use in the study of religion? And to all first-years: a warm w…

For many years, he was active in various management positions at the LION and even after his retirement he is still very involved. Professor Jan Aarts leads the Leiden hub of the Quantum Delta NL growth fund and is now temporarily responsible for national educational activities. In this way, he is helping…

As of this month, Kim Bonger has been appointed Professor of Chemical Biology. As a first-generation academic, she’s especially grateful. ‘I wasn’t exactly a top student at school. I never could’ve imagined this.’

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.

Does gravity work the same when you look at the largest scales in our universe? That’s what Leiden physicist Alessandra Silvestri will study with a 2 million euro ERC Consolidator grant. ‘We assume that it does, but we don’t actually know.’

It was already the most cited publication ever written at our faculty, but now a new milestone has been reached. Last month, a paper by emeritus professor Jan Reedijk and his co-authors surpassed 10,000 citations — and the count keeps rising.

In the coming academic year things will hopefully gradually return to normal, so that teaching can again take place as far as possible on campus. Even so, hybrid teaching is here to stay. We talk to Niels van de Ven, former lecturer at Leiden Law School and now Education Manager at the Centre for Innovation…

For the first time, research has been conducted on how the health of detained persons prior to their detention differs from that of non-detainees and to what extent health problems change over the period: from before and after their detention.

By looking at what is different, researchers often discover the special, the unusual. And that has already brought a wealth of highlights – also in Leiden.

To measure the level of user satisfaction of the renovated Arsenaal building, a survey has been conducted amongst staff members. The results are presented below.

Are maps objective or do they convey hidden messages that you would miss at first glance? A map is always a simplification of reality. Mapmakers reduce, distort and select. This allows the reader to be guided literally and figuratively. Leiden University Libraries (UBL) and the Museum Volkenkunde jointly…

Yvonne Erkens has been appointed Professor of Labour Law at Leiden University as of 1 January 2026.

Can a robot help prepare cancer medication in a hospital pharmacy? That’s what hospital pharmacist Tjerk Geersing investigated in his PhD research. He compared manual and automated preparations in terms of quality, efficiency, and safety. He graduated on 19 March.

A world-famous light experiment from 1801 has now been carried out with sound for the first time. Research by physicists in Leiden has produced new insights that could be applied in 5G devices and the emerging field of quantum acoustics.

It is an area of expertise that often remains invisible, but has a huge impact on the day-to-day operations of our faculty: education logistics. Program manager Erik Reinders has a passion for this work that goes beyond processes and procedures. 'We want to keep improving continuously.'

Het strategisch plan van de faculteit wiskunde en natuurwetenschappen (FWN) werd gepresenteerd tijdens de opening van het academisch jaar 2023-2024.

Western countries still tend to view Africa as the periphery, says anthropologist Mayke Kaag. In her inaugural lecture, she calls for a shift in perspective: to see Africa as a mirror of global developments.

Another year's end draws near. And what a year it has been! On December 12th staff and students of the Faculty of Archaeology came together to celebrate and reminisce. Professor Joanita Vroom got us in a festive mood by telling tales of Byzantine banquets, while a chef served historical dishes to sa…

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…

What should you do when you fall ill? And what can you expect from your direct supervisor? As both an HR adviser and someone with personal experience, Marian van de Walle outlines the key things you need to know.

Anisa Nuranisa recently joined the Institute as PhD candidate in the startersbeurs project "Cultural diplomacy and the Javanese Courts (19th and early 20th century)", led by Bart Verheijden and Fenneke Sysling. Below she introduces themselves.

A time-lapse of the universe in more detail than ever before: that’s the aim of the NSF–DOE Vera C. Rubin Observatory in Chile, which will unveil its first images of the night sky on 23 June. Researchers at Leiden Observatory have played a major role in making it all possible.

On 17 June, primary school pupils in Leiden will get the chance to explore science in an interactive and engaging way. The exciting new show ‘Wetenschapswonders’ is the initiative of master’s students Boele Visser and Ilse Hordijk, from the Rino Foundation. ‘I’m happy to help build a bridge between…

On January 1st Jasper Knoester started as our new dean. How is he doing? What exactly does he do? And what does his day look like? In each newsletter Jasper gives a peek into his life as dean.

Online dating is hard enough on its own, but these days you also need to know what terms like ‘zombieing’ and ‘prela’ mean. Alumni Milou Andree and Vivien Waszink wrote ‘Swipen voor een kwarrel, a book that discusses all the dating jargon, from the ‘scharrel’ to ‘pigbutchering’.

Neuroscientist Anne Urai has been awarded a Veni subsidy to further develop her ideas over the coming four years on how the brain makes choices. Why did she receive the award? Urai answers five questions about her Veni grant for young researchers.

Research

A delegation from the University of Edinburgh recently visited Leiden University to deepen their collaboration. What makes Edinburgh such an attractive partner?

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,…

For too long the Dutch collective memory has judged the Jewish Council too harshly. This perspective needs to be adjusted, Bart van der Boom argues in his new book ‘De politiek van het kleinste kwaad’ (lit. ‘The Politics of the Lesser Evil’).

Jasper Knoester is the dean of the Faculty of Science. How is he doing? 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.

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…

Nikie Veld is an education coordinator at Biology. Her job now mainly revolves around getting students back to the Faculty. ‘In the corona era, we were constantly rearranging the timetables.’

A team of international researchers led by Tomas Stolker in the Netherlands has imaged a young gas giant exoplanet near a 12-million-year-old star. The planet is orbiting a star at which planet formation has finished, while the same-aged companion star still has a planet-forming disk. The researchers…

Last Thursday, March 6, Sabine Luning passed away after an illness of more than six months. Sabine was an inspiring teacher who enthused generations of anthropology students with both the theoretical side of social science and the practice of intensive fieldwork. As a researcher, she produced innovative…