During his PhD research, mathematician Tyron Lardy worked on a new approach to hypothesis testing. Instead of the traditional p-value, he uses so-called e-values. These turn out to be more flexible – especially when you want to look at your results midway through the study.

Why does a medicine work well for one person, but cause side effects in another? Research by Laura de Jong shows that it’s not just our DNA that matters – other medicines and illnesses can also affect how our bodies respond.

The university is launching a campaign to focus extra attention on our smoke-free university locations. The University is using aptly named cigarette barrels to try to show clearly just how many cigarette filters are being saved from the environment. How harmful are these cigarette filters to the e…

A special type of mirror to reflect X-rays has more possible applications than space research. Targeted radiation therapy for cancer, for example. Next to his full-time job, physicist David Girou mapped out the possibilities. He will receive his PhD on 14 June.

Aya Ezawa bade farewell as Diversity Officer of Leiden University at a celebration in the Academy Building on 11 June. Since her appointment in 2019, she has been a tireless advocate for culture change and a champion for diversity, inclusion and equal opportunities for all.

Smiling faces, sweltering heat and a record-breaking donation – that was the Leiden Science Run 2025. On Saturday 21 June, the Leiden Bio Science Park turned bright orange as enthusiastic runners completed 4.5 kilometres to support research for vulnerable children.

Poland votes for a new president in a first round of elections on Sunday. Lecturer Jan Meijer points out: ‘The result will have a lot of impact on Donald Tusk's liberal government and its plans for reforms.’

A microscope with incredible sharpness that leaves samples unharmed – Guido Stam helped develop one. During his PhD research, he combined light and electrons to study biological samples. ‘We can now measure things that simply weren’t possible before.’

A sunny call from Fiji, a drenched arrival in Leiden and a day filled with conversations about cancer research, China and inclusion. Such are the turns a day can take — from itchy legs to a well-earned dessert.

Historical geographer Marcel IJsselstijn developed a new approach that improves our understanding of how medieval cities were planned. He hopes it will help archaeologists, urban planners and designers address contemporary challenges.

Eastern and Southern European countries struggle with ‘brain drain’ as skilled workers move to other EU Member States. Could restricting free movement be a legitimate and lawful way to address this trend? Researcher Martijn van den Brink will investigate the issue.

A European team of astronomers, led by Leiden-based researcher Konstantinos Migkas, has uncovered a large filament — a long, thread-like structure — of hot gas connecting four clusters of galaxies. This filament is made up of what scientists call the warm-hot intergalactic medium.

At a celebratory event, 25 Leiden University projects received a Kiem grant of up to €10,000 for an interdisciplinary research or education initiative. The grant was in demand, as no fewer than 91 projects applied this year.

Leiden University is taking a major step forward in the energy transition with the expansion of the thermal energy storage (TES) in the Gorlaeus Building. This expansion is needed to be able to heat and cool all the new and renovated buildings on the Campus Square of the Faculty of Science sustainably.…

Anne-Laura van Harmelen has received a Vidi grant from the Dutch Research Council (NWO). This talent programme will enable Van Harmelen to research the social and neurobiological mechanisms of resilience in young people with childhood trauma.

Want to get fit at work with your team, department or faculty? In its Let’s Move campaign, the University Sports Centre is making exercise at work easy. Staff from the Faculty of Science got the ball rolling before the summer in a successful pilot with yoga, boot camp, boxing and self-defence classe…

AI has applications in all kinds of fields. Would you like to organise an event on the possibilities of AI in your research field? The Leiden interdisciplinary research programme SAILS offers you experts on content, money and other support.

Social

Organisation, Social

Rose Vossen has been named winner of the Young Star Award 2021. The Life Science and Technology student received the award on Monday from Ewine van Dishoeck, the founder of the award. Vossen wins a cheque for 2,500 euros for her exceptional results as a bachelor's student. During her final bachelor…

Mimicking photosynthesis to produce bioplastics sustainably and efficiently. Researchers from the Institute of Biology Leiden (IBL) and the Leiden Institute of Chemistry (LIC) will assess this new approach. ‘An exciting opportunity to explore a new, appealing research topic in a collaboration between…

Marta Fiocco has been appointed as of 1 April as professor of applied mathematics, in particular medical statistics. Fiocco's appointment is at the Faculty of Science and at the Leiden University Medical Centre (LUMC). She conducts research into 'personalised medicine', tailor-made medicines for cancer…

Leiden University will set up further activities with the Asian Development Bank (ADB).

Latin America matters! With its rich history, culture, its impressive resilience and creative innovation in the face of such a diverse array of challenges, Latin America can indeed show the way forward inspiring for positive change. Working together with Latin American institutions, our researchers…

With its Green Deal The European Union has set itself much-needed ambitious climate goals. But the energy crisis and geopolitical tensions are making these difficult to achieve. Seven researchers from the Leiden-Delft-Erasmus Universities (LDE) alliance have written a white paper offering solutions.

Marjolijn joined Leiden University in June as Policy Adviser on Healthy University and Staff Absence. She is passionate about healthy living and is pleased to be able to draw on this in her work. She is currently hard at work on the preparations for Healthy University Week, which will be from 31 October…

It has been preying on people’s minds: the outline agreement and its proposed cuts to higher education. Although the content is not yet set in stone − the outline agreement will be developed into a coalition agreement − we are certain that Leiden University should also expect substantial cuts.

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…

Op zaterdag 3 juni vindt de Museumnacht Leiden plaats. Ook dit jaar zijn Leidse wetenschappers en studenten onderdeel van de programmering.

A leaving do, birthday or other celebration? Many people like to ask for a donation to a good cause for their birthday or anniversary present. Leiden research can be one such cause.

Organisation

How can we manage our natural resources more sustainably? That’s the key question behind the United Nations’ International Resource Panel (IRP). The panel recently welcomed a new member: René Kleijn, Professor of Industrial Ecology at Leiden University. We asked him three questions about his new rol…

How do you count the nanoplastics in your body? Leiden researchers published a method in Nature Protocols today that should make this easier. Important for both environmental and medicine research.

When a spot in the core group of the Strategy Team became available, she immediately applied for the position. Because as Head of HR, Elice Schöne feels it is important that her department is well connected to the strategic plan.

Leiden University will deepen its cooperation with knowledge institutions in Africa. During a trip to Ghana, a delegation spoke with several African knowledge institutions about intensifying their collaboration.

The national Npuls Growth Fund programme has awarded a grant for the development of the Leiden Education Support (LES) Network. The project led by project manager Joasia van Kooten will start on 1 June.

Research

Research

Michiel Hogerheijde has been appointed Vice-Dean of the Faculty of Science as of 1 January 2027. He succeeds Bart de Smit, who has held the position since 2019. Hogerheijde is looking forward to working together with students and staff. ‘Good education is something you create together.’

Two projects from Leiden University have been awarded a grant through the programme.

On 28 June, ten dedicated lecturers received their Senior Teaching Qualification (SKO). Rector Hester Bijl congratulated them in an online meeting. We asked some of them what this qualification means to them, what they believe ‘good teaching’ entails and what makes them so passionate about education…

Research

Exhibition

Workshops, lectures

Seminars, workshops

High-quality education, research involving multiple faculties, collaboration between universities and central government funding to make all this possible: these were the topics covered in a working visit of the Standing Committee for Education, Culture and Science (OCW) to the Association of Universities…

NATO not only safeguards our security and stability, but also defends Enlightenment principles, promoting prosperity, health and freedom. This is what eminent psychologist and thinker Steven Pinker argued to a packed Great Auditorium.