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

Facility, Organisation

Tapping to a rhythm, recognizing sound patterns and enjoying music: For people, it is common sense. But is this also the case for animals? It is the research topic of Michelle Spierings, a researcher at the Institute of Biology Leiden, and it is nominated for the Klokhuis Wetenschapsprijs.

The SENSYN project has found a solution to few public datasets for criminological research: synthetic datasets. Marieke Liem talks about this unique innovation

Astronomers at Leiden University have detected rare isotopes of carbon and oxygen in our neighbouring stars for the first time, providing a new window to better understand the chemical evolution of the cosmos.The results are published today in the journal Nature Astronomy.

Alumnus Sam van Raalte followed his passion into freelance journalism.

Antibiotic resistance is an economic problem. Pharmaceutical companies cannot earn much from antibiotic research, so they do not invest in it. This makes it important that universities do so, says Ned Buijs.

Biological chemist Nathaniel Martin and his team received an NWO grant to examine how blocking a specific enzyme in our body, NNMT, could be helpful in the treatment of some cancers. Trials with mice have been promising, and together with the Netherlands Cancer Institute, Martin wants to take the next…

Four Leiden researchers have been awarded Proof of Concept grants by the ERC. These grants, each worth 150,000 euros, help researchers translate the findings of previous ERC projects into innovative practical applications.

In the space of seven weeks, the staff of the LUMC and Leiden University have left home more than 35,000 times for a short walk, or an Ommetje as it is known. Healthy University Leiden launched the Ommetje walking challenge to encourage its staff to adopt a healthy lifestyle. Thus far this has resulted…

Leiden researcher Anne-Grete Märtson brought together a large number of studies to better understand antibiotic dosing in patients with obesity. The publication in a renowned medical journal has already garnered much positive reactions, Märtson says. ‘It’s high time researchers started sharing more…

A female body equals a woman. Nonsense, says Professor by Special Appointment to the Socrates Chair Annemie Halsema. She argues that our sense of identity and social environment also determine our identity. ‘We should stop assigning people’s sex at birth.’

From social inequalities in prehistory to placebo effects in medical treatments. Four researchers from Leiden University have been awarded a prestigious ERC Advanced Grant worth EUR 2.5 million to develop their research.

How does an embryonic stem cell decide if it becomes a heart cell or a kidney cell? That’s the question computational biologist Maria Mircea studied for her PhD research. She looked at the inside of individual cells to analyse how they change. This is what she discovered.

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.

How can you increase the effectiveness of inspectors using responsible artificial intelligence (AI)? This is the question the Innovation Center for Artificial Intelligence (ICAI) Lab AI4Oversight is tackling. By developing algorithms and methods, they try to provide optimal support for, for example,…

Friday afternoon, 1 October. Location: one of the most vibration-free places in the world. In this setting, Leiden top scientists launched Quantum Leiden. For decades, researchers at the Faculty of Science have been investigating quantum technology at the highest level and also have been brainstorming…

Cookware handles, electrical plugs, brake pads. Unlike other plastics, these ‘thermosets’ cannot simply be melted down and reshaped, making them difficult to recycle. Chemist Roxanne Kieltyka and her team are now exploring a way to make these materials recyclable, potentially transforming the way we…

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.

Artificial intelligence systems are smart. They can recognize patterns better than humans, for example. Yet humans are still very much needed. How can you better steer those AI systems? LIACS lecturer Jan van Rijn wrote a book about this together with a number of colleagues. We asked him a few quest…

The University urgently needs IT talent. The ISSC has therefore started a pilot refer-a-friend scheme: if you recommend someone you know for a hard-to-fill IT job and they are hired, you will receive a 1,500-euro (gross) bonus. ‘So hit us with your golden tips,’ says ISSC director Joop van der Born.

Digitalisation can make a huge contribution to a greener future, but it must also be as sustainable as possible. To make significant progress, more collaboration and national leadership will be needed. Leiden University has therefore signed the Digital Sustainability Manifesto, which was presented on…

Computer scientist Tim Coopmans uses pen, paper and regular computers to simulate the best possible quantum computer. He tells about his research and how this helps make a useful quantum computer a reality a little bit sooner. ‘I hope I will get to see quantum computers contributing something really…

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.

The guardian of our genome, the protein MutS, scans the DNA for spelling errors and makes sure they are corrected. An essential process for our health. Researchers at Leiden University Medical Centre (LUMC) have discovered precisely how this protein works by making MutS visible with cryo-electron microscopy.…

SAILS and CAIRELab, the LUMC’s AI expertise centre, recently held an event that gave healthcare professionals and computer scientists the chance to meet. The meeting proved fertile ground for new collaborations.

PhD candidate Joeri Schoenmakers works at the LIC and describes how his days revolve around new experiments, oxygen-free reactions and supervising students. The mix of freedom, variety and a close-knit team means he enjoys both his research and his teaching role every single day.

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.

On Wednesday 27 September we will be holding a debate for students and staff on our links with the fossil fuel industry in relation to the topic of sustainability. All students and staff of the university are cordially invited. If you’re still not sure about whether to attend, these four questions and…

Paul Wouters received the RISE Award, an award by the women’s network RISE, for his commitment to increasing gender equality at the Faculty of Science. ‘It makes it clear that it is possible to truly make a change in 9 months. That is why I am happy with this award.’

Brain scans, heart attacks and credit scores: many science applications revolve around data. But how do you mine applicable insights from a mountain of data? In a Bachelor Honours Class, students discover how data science can contribute to their discipline.

Professor Jan Willem Erisman is happy with the freedom at our University. But frameworks are needed, he believes. That is why he makes a proposal for such a framework from the perspective of his own profession. In fact, he makes a proposal for a wonderful ambition for Leiden University.

Leiden University Medical Center (LUMC), as a partner in the reNEW consortium, is once again receiving tens of millions of euros for research into new treatments based on stem cells. The collaboration will receive a total of €150 million to develop new therapies in regenerative medicine.

Pim Overgaauw is at his best when he can support others. His new position as Institute Manager of the Mathematical Institute is therefore a perfect fit. ‘My main goal is to ensure that our mathematicians can focus on the maths.’

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

Data Science & AI student Nataliia Bagan combines a passion for mathematics, language, and artificial intelligence. Her exceptional bachelor’s thesis on improving reasoning in large language models earned her a nomination for the Leiden Science Young Talent Award 2025.

Collaborations with funds and foundations enable a lot of research. As Fundraiser for Foundations and Major Donors, Madelon Rolleman seeks out these opportunities for Leiden University. ‘I’m always looking for ways to start my conversations with funds and foundations.’

X-ray and CT scanners are widely used devices in research, diagnostics and the industrial sector. And yet they are not nearly as fast and accurate as we would like. Mathé Zeegers is researching the newest technique in the field at the Centre for Mathematics and Computer Science: spectral X-ray imaging.…

Professor of International Relations Daniel Thomas is clear: anyone taking peace in Europe for granted is shutting their eyes to reality.

Language is omnipresent: when you talk, app or meet in Teams. Understanding how we communicate with one another and what communication does to us is essential. In her inaugural lecture, Nivja de Jong will call to redress the balance between the sciences and the humanities.

Our university recently joined the European university alliance Una Europa. Staff from the 11 affiliated universities met in Leiden last week to discuss our collaboration.

Professor of Computer Science Joost Batenburg has received half a million euros from the Dutch Research Council (NWO) to improve the conservation of historical paintings with 3D X-ray imaging.

Research

Galaxies in the early universe contain more dust and hidden star formation than previously thought. That's what Ivana van Leeuwen concludes in her PhD research, where she combines data from various telescopes to create a more complete picture.

ICT

Human resources

Researchers have used AI to reconstruct the rules of a board game carved into a stone found in the Dutch city of Heerlen. The team concludes that this type of game was played several centuries earlier than previously assumed.

What do you do when a discovery in the lab shows real promise? Scientist Mirjam Huizenga founded a startup to develop a new treatment for nerve pain caused by chemotherapy. ‘The goal is to give patients a better option.’

Ammonia has been feeding the world for decades as a fertiliser and is now rapidly emerging as a carbon free fuel for shipping and industry. But if we focus only on CO₂ emissions, we risk creating new nitrogen problems, warns nitrogen expert Jan Willem Erisman in the journal One Earth.