Study information, Graduate School

Lecture, Tuesday Talks: Science Insights

Lecture, Roundtable

VVIK Symposium

What is freedom worth in times of hunger? ‘Beleg’ is a modern interpretation of Lucretia van Merken’s 1774 play. With five performances in Leiden’s Schouwburg theatre, the play is a prominent part of the Relief of Leiden celebrations, and Leiden alumni are playing a big role. Take a look behind the…

Lara Ummels came from Maastricht to study law in Leiden, and never left. She recently joined the board of the 3 October Association.

Paul Wouters came to the Faculty of Science for a few months to help with organising day-to-day issues after the previous dean left. This has involved rather more than he expected. ‘I can now really understand why every faculty has its own dean.’

Lecture, European Union Seminar / CHEI Seminar

On 19 June, the grounds of the Kamerlingh Onnes Building were transformed into LAWLANDS! It had everything: sun, music, science, beach, games, quizzes and, above all, an enthusiastic audience of staff and students.

Wouter Weeda has been appointed Scientific Director of the Institute of Psychology by the Board of the Faculty of Social and Behavioural Sciences. He will start on 1 December 2025 for a period of three years, succeeding Hanneke Hulst.

Sometimes an idea seems so logical and elegant at first glance, that you later wonder why no one thought of it before. Two researchers from LACDR have teamed up to develop a completely synthetic alternative to antibodies—one that mimics their size, shape and function, but which is cheaper, more stable,…

The biographer of Leiden University, Willem Otterspeer, has a new book out. In ‘De stad, de dood en de dichters’ (The City, Death and the Poets) he combines his love for the University and poetry with autobiographical reflections. ‘With my magnifying glass I discovered yet more new details in the pr…

Bacteria carry countless hidden treasures in their DNA: fragments that could hold the key to new medicines. But how do you pick out the most promising ones from millions of options? ‘Look at the switches that turn genes on and off,’ says molecular biologist Gilles van Wezel.

Cancer research generates massive amounts of data, but traditional tools often fail to fully harness their potential. How can we unlock this data to provide better treatments for cancer patients? PhD candidate Marina Gorostiola González explored this by using advanced data analysis techniques to guide…

Predicting the collective behaviour of systems, like a large group of people electing one of the parties, is no easy task. But there’s a theory that scientists have been using for decades to do just that: the theory of Gibbs measures. Last week, mathematician Mirmukhsin Makhmudov earned his PhD for…

National Meat Free Week (Nationale Week Zonder Vlees, 7–13 March) is an initiative to reduce meat consumption. Assistant professor Paul Behrens is studying what impact a change in our food consumption would have on the world. What, according to him, are the main reasons to switch to a (mainly) plant-based…

It has only recently been discovered that single-celled organisms (bacteria and archaea) also have histones—proteins that structure DNA. Now, Leiden PhD candidate Samuel Schwab has found that the histones in these organisms are much more diverse than previously thought. Schwab and his colleagues describe…

Few people would associate the name Anton de Kom with Leiden. Yet the Surinamese freedom fighter is the subject of an exhibition at Museum De Lakenhal.

An international team of astronomers led by Dutch scientist Martijn Oei has discovered the largest pair of jets from a black hole ever seen. The 'jumbojets' extend a combined length of 140 Milky Ways. The Leiden Observatory played a prominent role in this research. The publication will feature on the…

Museum Boerhaave commemorated the hundredth anniversary of Einstein’s Theory of General Relativity with the exhibition ‘Einstein & Friends’. The exhibition shined light on the famous physicist’s Dutch friends and his love for Leiden. A review featuring seven images can be found below.

Seven Leiden professors have been elected as members of the Royal Netherlands Academy of Arts and Sciences (KNAW). In total 23 new members will be inaugurated on Monday 13 September.

When Floris Harm took up his role as director of the Leiden Asia Centre, he made a remarkable discovery on the university website. It turned out that a past family member was one of Leiden University’s first sinologists.

By chance, computer scientist Hans-Dieter Hiep (Leiden Institute of Advanced Computer Science and Centrum Wiskunde & Informatica) discovered a ‘gaping hole’ in a widely used method for evaluating software security. Hiep patched the hole, causing quite a stir in his field. 'It’s not pleasant when a PhD…

Academic ceremony

Conference

‘Be yourself. Be as gay, queer, trans as you can and show the world you exist.’ These rousing words from Looi van Kessel marked the start of the third Pride Leiden for the university boat, with the theme: ‘450 years of being yourself’.

Connecting as the magic word. Seeking new collaborations, presenting ourselves to the outside world with an open attitude and showing what we do. During the opening of the academic year on Tuesday afternoon, Dean Jasper Knoester emphasised that change and connection are necessary for the university…

Festival

Conference

The first full-colour images of the cosmos from ESA's space telescope Euclid were presented today. Never before has a telescope been able to take such crystal-clear astronomical images of such a large part of the sky and so far into the deep universe. The five images illustrate Euclid's full potential;…

Connecting scientific fields, enhancing research and teaching, and providing innovative solutions to complex social issues: that is the idea behind interdisciplinary research. What did the university achieve in 2024? A small sample.

Conference

Leiden University is introducing 15 interfaculty themes to improve its visibility and strategic positioning. These themes can now be found on our website.

Emeritus Professor of Molecular Astrophysics Ewine van Dishoeck has been named a Citation Laureate by Clarivate, a research analytics provider. Clarivate considers her an influential researcher of the calibre to win a Nobel Prize.

Words originally intended to indicate space, such as ‘out’, are also regularly used to indicate cause and effect. Why does this happen? And how does it work in other languages? PhD candidate Camil Staps decided to find out.

Are you worried about your smartphone addiction? Trust us, it could have been far worse… A shocking discovery, by an interdisciplinary team of specialists from Leiden University, revealed that Neolithic people were heavily addicted to stone axes. The axes were produced under horrific circumstances in…

It will be a summer filled with conferences at the Faculty of Humanities in Leiden. In the coming months, there will be something for everyone at the university, especially in the field of languages and cultures of Africa and the Middle East.

An international team of astronomers led by Violeta Gámez Rosas (Leiden University) has observed a supermassive black hole hidden in a ring of dust. This discovery fits the idea that the so-called active centers of galaxies are much more similar than observations show, because the viewing angle from…

Through its Demonstrator Projects, the Dutch Oncode Accelerator consortium provides grants for preclinical cancer therapy development. The first call for these projects is open until September 2025.

Why are morpho butterflies blue? That is what high school students Frederique Kerstens and Koen van Griensven investigated in their high school profile paper at the Leiden Institute for Research in Physics. In doing so, they won the KHMW Profielwerkstukprijs 2023. ‘We didn't expect it, but are of course…

Proving a quantum computer to be quicker than a normal one is one step closer. After a breakthrough in speeding up classical algorithms, researchers Vedran Dunjko and Casper Gyurik showed that only one quantum algorithm could beat its classical counterpart. They discuss their discovery in Quanta Mag…

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…

Eight early-career researchers from around the world have been awarded a 51 Pegasi b Fellowship – a prestigious opportunity for astronomers. Julia Santos, a PhD candidate at Leiden Observatory, is one of them. We asked her four questions about this remarkable fellowship.

From research on the first human ancestors to leave Africa to mathematical models in random disturbances. For Leiden researchers have been awarded a prestigious Vici grant by the Dutch Research Council.