Cotton is the most widely used natural fibre for clothes. But how polluting are our jeans and shirts actually? Environmental scientist Laura Scherer coordinated an international research project on the impacts of cotton. ‘The purchases of consumers in Europe can contribute to water scarcity in China…

A group of biology students are working on a solution to the world’s plastics problem by getting bacteria to make biodegradable plastic.

You win the Leiden Teaching Prize and suddenly all eyes are on you. Three past recipients reflect on how this student-awarded prize has changed how they work and improved their teaching – and how they chose to spend the money.

Is our musicality unique? That’s what the Bird Singalong project aims to find out. And for that, they need the help of feathered friends from all around the world. ‘By researching how parrots learn songs, we also learn more about the origin of our own musicality.’ Do you have a parrot that can sing…

At the annual reversed constitution reception (omgekeerde constitutieborrel), the Executive Board presents an award to a student organization that has made an inspiring and impactful contribution to the well-being and social safety of its members. This year, ESN Leiden won for its program ‘Together…

'Working on your leadership starts tonight,' says lecturer Sandra Groeneveld at the introductory meeting of the Leiden Leadership Programme. The programme has been renewed this year, and students are ready to dive into it: 'I hope to get to know myself.'

Since September, Victor van der Horst is a member of the Faculty Council. Well, not just a member; he is the Chairman! In addition, this master's student in Mathematics also devotes himself to our Faculty in many other ways. 'I'm convinced we need input from all layers to keep improving our Faculty.'…

For the first time, an international team of scientists led by Leiden Observatory and SRON can explain the extreme jet streams observed around the equators of all the giant planets using a single model.

Whereas the Netherlands Court of Audit used to conduct an investigation once a year, the average civil service organisation now has a few per year to contend with. Is so much going wrong nowadays? Not at all, says Professor by Special Appointment Sjoerd Keulen. ‘It’s one of the methods that makes democracy…

One day you feel inspired by a field trip, the next you are a speaker at TEDxLeidenUniversity. It happened to International Relations student Alexia. How did she end up on stage – and why did she want to? Alexia shares her story with us. ‘I was given hope, and I wanted to share it with others.’

Canal Watch (De Grachtwacht), which has been cleaning canals since 2018, has received the Dutch Research Council (NWO) Communication Initiative Award.

On March 28, 2023, our esteemed colleague Prof. Harry Wijshoff passed away. He died after a struggle of several months against a serious illness.

International researchers have, for the first time, pinpointed the moment when planets began to form around a star beyond the Sun. Using the ALMA telescope, in which the European Southern Observatory (ESO) is a partner, and the James Webb Space Telescope, they have observed the creation of the first…

Alumni who live and work in Brussels met on 18 February at the annual Leiden Alumni in Brussels Event. As well as celebrating Leiden University’s 450th anniversary, they also looked at the challenges Europe faces.

Jasper Knoester is the dean of the Faculty of Science. How is he doing, what exactly does he do and what does his day look like? In each newsletter, Jasper gives an insight into his life.

Connecting worlds, enhancing research and teaching, and providing innovative solutions to complex social issues: that is the idea behind interdisciplinary research. In that respect, a huge amount happened at Leiden University in 2023.

How is academic freedom restricted by the academic community itself? This was the central question at a debate at Leiden University on 14 November.

On 26 November historian Jan Grabowski and sociologist Barbara Engelking will both give the Cleveringa Lecture. They wrote a book about the Holocaust in Poland and were taken to court for defamation.

The Schoof cabinet has presented its budget. As expected, higher education is facing severe cuts. In the coming period, the Executive Board will regularly look at the consequences of what it deems an irresponsible policy.

The university elections are coming up. Sustainability, inclusion, student well-being: what do you think should get more attention? From 22 to 25 April you can vote for who represents you as a student on the University Council and your faculty council. Read on to find out more about the six student…

Hydropower plants need not be disastrous for fishermen and nature. For that, we need to place new dams more strategically, but also modify or even remove some existing ones. Valerio Barbarossa and Rafael Schmitt showed that with a computer model of the Asian Mekong basin.

Protests have been raging in Iran for two months since the death of 22-year-old Mahsa Amini. The role of social media in the protests against the Iranian regime should not be underestimated, says Senior Assistant Professor and Iranian Babak RezaeeDaryakenari.

Two organisers at heart. In the background, facilities managers Nick van Asperen and Kees Schoonwater ensure that staff and students have everything they need to work and study well. Recently, the familiar faces started doing so in a new role. Schoonwater is now project manager housing and Van Asperen…

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.

Nano-plastics cause malformations. Meiru Wang, researcher at the Institute of Biology Leiden, looked at the extreme effects polystyrene nano-particles could have, using chicken embryos as a model. Her results were quite alarming. Especially as nano-particles are everywhere. In the air, floating through…

Parents from all corners of the university bring their children to De Kattekop, the university’s day nursery. How does manager Ellen Buschman use her psychology degree in her work?

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.

The ‘Committee for Assessing Ethical Aspects of Partnerships’ is being launched this month. This committee, created by Rector Magnificus Hester Bijl and consisting of former and present Leiden University researchers, has been tasked with assessing Leiden University’s institutional ties with organisations…

What started with a huge sheet of paper from the V&D shop grew into one of the larger men’s sub associations at Quintus. Professor Gerard van Westen looks back on his student days with a smile: they gave him far more than just drinks and late nights.

‘All the groceries, but not a fig for young workers’, read a banner during the occupation of Ahold’s headquarters in 1981. ‘For a long time, young workers were not taken seriously, but they managed to put themselves on the map’, says historian Rosa Kösters.

Leiden scientists lead COLIBRE, a groundbreaking set of cosmological simulations. By including key missing physics, cold gas and cosmic dust, they offer the most realistic picture yet of how galaxies formed and evolved since the dawn of time.

The three parties currently forming a government – D66, CDA and VVD – have presented a new coalition agreement, in which they announce their intention to reverse the substantial funding cuts to higher education. This is encouraging news, although many uncertainties remain. The Executive Board will closely…

Education, Research

The Schoof cabinet has presented its budget. As expected, higher education is facing severe cuts. In the coming period, the Executive Board will regularly look at the consequences of what it deems an irresponsible policy.

Molecular Science & Technology student Renske Donkers has won the second edition of the Young Star Award. During the ceremony on Wednesday 17 February, no less than three teachers were awarded the title 'Teacher of the Year'. Finally, students had a surprise in store for all teachers: with a video they…

Education, Research

The Indonesian Student Association in the Netherlands, ‘Perhimpunan Pelajar Indonesia Belanda’, has teamed up with the Indonesian embassy in The Hague and Historia.ID magazine to create an exhibition to mark the association’s 100th anniversary. The student association, which was founded in Leiden, played…

‘It was not always accepted, but I just wanted to be a researcher. Now, I am as happy as can be.’ It is one of the quotes from the International Women’s Day presentation for Biology students. Seven women, working as researchers and teachers at the CML, IBL, and Naturalis, shared their experiences with…

Students and researches from all faculties at Leiden University are warmly invited to a lunch meeting on Monday 14 October, discussing the rise of AI and the challenges this poses for various governance structures. The event is hosted by Leiden University’s interdisciplinary programmes GTGC and SAIL…

Since 1 November 2025, Prof. Dr. Luc Sels has been the new president of Leiden University's Executive Board. In a message to our university he introduces himself and shares his first impressions.

We are looking for students who are 16 years or older and are studying at a Dutch mbo, hbo or university. Our aim is to gain insight into the needs and perceptions of students regarding stress and burnout. In short, we aim to carefully listen to the students’ needs: how can we help you?

Leiden University opened the doors of its new Living Room on Thursday 16 February. The Living Room is a home from home where Dutch and international students can relax and meet others and is a strictly no-study zone.

‘The Oscars of the natural sciences’, is what they are called: the Breakthrough Prizes awarded annually in America by the Breakthrough Foundation. Part of this are the New Horizons prizes for early-stage researchers. Sebastiaan Haffert, researcher at the Observatory, is this year's winner.

The Schoof cabinet has presented its budget. As expected, higher education is facing severe cuts. In the coming period, the Executive Board will regularly look at the consequences of what it deems an irresponsible policy.

Developing a better treatment for patients with head and neck cancer, that is what Binanox, The 2022 iGEM Leiden team, want to achieve. They hope to raise at least 10,000 euros for this cause. Support their crowdfunding campaign today.

The 'Groot Nederlands Student Kampioenschap' student games have been held for the first time in two cities, Delft and The Hague. To make this happen our Campus The Hague worked together with The Hague University of Applied Sciences and Inholland University of Applied Sciences. Three students look back…

During the last couple of months, Leiden University has conducted many constructive discussions with the University Council and many other experts and groups from the academic community. Based on their input, the Executive board has decided to create a preliminary policy regarding our ties to Israeli…

A memorable farewell symposium and a royal distinction: Professor Joke Bouwstra could not have completed her career at Leiden with more pleasure. On Friday, 14 June, she received a Royal Honor from Leiden Mayor Peter van der Velden, who appointed Bouwstra as a Knight in the Order of the Dutch Lion for…

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…