The powerful Dutch East India Company and West India Company were summoned before the High Court more often than historians have assumed. The complainants varied from competitors, to the Companies' own staff and even poor citizens. This is what Leiden historian Kate Ekama has discovered. PhD defence…

Alumnus Stan van Haasteren went to Northern Ireland in 1995 as a freelance journalist with a guitar strapped to his back and recently wrote a book about his experiences in Belfast. ‘The big difference with then is that today there is no more violence. But it's still a divided city.’

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…

‘The Netherlands’ response to coronavirus is inconsistent.’ These are the words of Leiden political scientist Arjen Boin, an expert in crisis management. Vulnerable groups such as the elderly need more personalised advice. ‘It would be better to cancel bridge tournaments than football games.’

In January 2020, the team took a break from their respective field sites and travelled back to Leiden to take stock of their research progress and to host its third Advisory Board meeting at their home institution, the Institute of Cultural Anthropology and Development Sociology of Leiden Universit…

Worldwide, countries are barely prepared for major borderless crises such as extreme natural disasters or other unexpected calamities that destabilise society, Professor of Political Science, Arjen Boin, warns. In his inaugural address on 23 October he makes some recommendations.

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…

Cleaners who have just ninety seconds to clean each toilet. Bus drivers who have too few comfort breaks. Food deliverers who are apped by an algorithm if they cycle too slowly: 'Can't you find it?' How do people keep going in today's demanding, dynamic work environment? This is the core question in…

Preparations for receiving 123 refugees in the University Sport Centre have been in full swing for several days. The large sports hall will be transformed into a dormitory, and a living and dining area. There will also be two recreation areas, one for adults and one for children.

Exactly a century ago, astronomers observed the first two diffuse interstellar bands (DIBs) in space. A DIB manifests itself as a colour of light that is missing in the radiation from stars behind an interstellar cloud. Although about 500 DIBs are yet discovered, they remained inexplicable until recently.…

How is it that some covid-19 patients are affected much worse than others? Can we predict beforehand which of them will develop critical symptoms Professor Thomas Hankemeier, together with a diverse consortium of universities, academic hospitals and industrial partners, is looking for the answers to…

Since January the Dutch public have been able to follow a free course on artificial intelligence (AI) and its far-reaching impact on our lives. Leiden scientists Marlies van Eck and Valerie Frissen, from the Institute for the Interdisciplinary Study of the Law at Leiden's Law Faculty, are part of the…

Viktorija Kostadinova, from Macedonia and currently a second-year PhD student at the Leiden University Centre for Linguistics, has just returned after two and a half months at the University of Michigan: ‘It was a truly rewarding experience.’

Racism and discrimination come in many different shapes and forms – in the Netherlands too. Verbal attacks, stereotypes and violence: some people are confronted with these on a daily basis. A group that is often not included in research and the debate on racism is people of Asian descent. The Diversity…

Three speakers, three fascinating science stories and a well-filled lecture hall. The Niko Tinbergen Lecture had a successful restart on 10 December 2019.

By a stroke of luck, a team led by Dutch PhD student Martijn Oei has discovered a radio galaxy of at least 16 million lightyears long. The pair of plasma plumes is the largest structure made by a galaxy known thus far. The finding disproves some long-kept hypotheses about the growth of radio galaxie…

Professor Sandra Groeneveld’s inaugural lecture is getting closer. On May 27 she will deliver her lecture called: “The relevance of bureaucracy. How to deal with ambivalence in public management”. Ahead of this inaugural lecture, professor Groeneveld gave us an interview last week. In this interview…

In his guest lecture on 22 January André Kuipers took school pupils and students on trip through space. His mission was to interest his young listeners in science and technology.

Researchers Rowie Stolk and Caelesta Braun’s ‘Litigation in the name of public interest’ Kiem project included an interdisciplinary workshop on the same topic. For starting PhD candidates in particular, this was the chance to build valuable connections.

How do you study complex disasters like a nuclear explosion or a natural disaster? Who can help unravel the legal knot that Brexit has become? The important societal themes of the present day call for interdisciplinary collaboration. Leiden scientists pitched their research at a symposium at Leiden…

Alumnus Anoma van der Veere did Japanese studies and talks in this interview about his studies in Leiden and his work as a researcher at the Leiden Asia Centre and as Japanese correspondent in Tokyo.

After seven years, Eric Eliel resigns as scientific director of the Leiden Institute of Physics (LION). On April 18th, LION hosts a farewell party and a week later Eliel will officially hand over his tasks to Jan Aarts. We spoke with him about his term as director, in which among others a new science…

How ethical is research involving humans and robots? And can research on artificial intelligence cause problems when it ends up in the wrong hands? In any research involving humans or their data, the ethics committee assesses where the issues are. Associate professor at LIACS Suzan Verberne chairs the…

Politicians throughout the whole of Europe need to be more honest with their voters and dare to take confrontational measures when necessary. This was the message given by Jeroen Dijsselbloem in the annual Europa lecture on 17 January in Leiden's Academy Building. As newly resigned President of the…

Plants that grow in patterns of stripes on the edge of deserts, plankton that live on the sea bed or oscillate in the water, and melanomas that spread throughout the body. Mathematician Lotte Sewalt discovered the common elements in these three systems. PhD defence 8 September.

Thousands of first-year students and hundreds of mentors kicked off the EL CID on Monday morning. This year for the first time, the introduction week of Leiden University and Leiden University of Applied Sciences was also open for students of Regional Training Centre mboRijnland and the Leiden Instrument…

Leiden University has secured an impressive 12 European exchange grants. This is good news for students, lecturers and researchers from home and abroad.

Kerstin Perez has reached the position of Assistant Professor of Particle Physics at the renowned Massachusetts Institute of Technology (MIT). For people from minority groups this is by no means a common experience. Perez will explain how improvements can be made at the annual Diversity and Inclusion…

According to some stories, Einstein washed his hands there only once. According to others, students moved it as a joke. Whatever the case may be, Einstein's sink has enjoyed mythical status among students and employees of the Faculty of Science for decades. But what is the real story? Alumnus Alex Pietrow…

Five years after the Arab Spring it seems as if the only sign of success is in Tunisia. But is that really the case? The Leiden University Centre for the Study of Islam and Society (LUCIS) is organising a panel discussion on this topic on Friday 12 February.

In October, LUCIS and NIMAR will host a two-day workshop in honor of the 50th anniversary of Islam Observed, Clifford Geertz' comparative study of Islam in Morocco and Indonesia. Send in your proposal and get a chance to share your work in Rabat this fall.

Multidrug-resistant pathogens and worldwide pandemics are increasing, making infectious diseases more prevalent. To develop new treatments, deeper knowledge of the interaction between bacteria and human cells is required. Ariane Briegel recently became a Medical Delta professor and studies such path…

Astronomers from Leiden Observatory have developed a new method to find distant quasars and better distinguish them from other objects that look like them, using machine learning techniques. The research result has been accepted for publication in the journal Astronomy & Astrophysics. It is the last…

Alireza Mashaghi and his research team have created a new framework to understand shapes of proteins and DNA. With this framework, many diseases can be understood better.

In the discs of dust and gasses around young stars, mysterious structures occur. Together with professor Ewine van Dishoeck, PhD student Paolo Cazzoletti investigate how we can explain these forms, such as rings, spirals and holes. On 12 December, he will defend his thesis.

Is my cap on straight? Where in the cortège will I be walking? These are some of the questions asked by professors joining the Dies Natalis procession for the first time.

Leiden has scored highly with the recent Vici awards. Of the 31 Vici winners announced by NWO, 4 are researchers in Leiden. The winners are: Professor of Family and Child Studies Marian Bakermans-Kranenburg, information scientist Peter Grünwald, astronomer Linnartz and Professor of Buddhism Jonathan…

The cloud is of increasing importance in our daily lives. It is thus crucial that they work properly and are reliable. Alex Uta, assistant professor at LIACS, received a Veni grant to investigate the reproducibility of experiments in the cloud.

‘It is a fantastic sum of money,’ enthuses classicist Professor Ineke Sluiter. ‘It gives me not just an award, but a task as well. And in all honesty, I prefer it that way.’ She is already brimming with ideas about what she will do with her Spinoza Prize.

Should we be growing rice and building materials instead of grass for cows? From invasive crayfish to cultural heritage and groundwater levels: ten graduating students explored the future of the Groene Hart, the rural region just outside the cities of Delft, Rotterdam and Leiden where they study.

It was already known that social anxiety disorder often affects more than one person in the same family. But research by PhD student Janna Marie Bas-Hoogendam has now shown that there are genetic brain characteristics that are associated with social anxiety. The PhD ceremony will take place on 14 Ja…

Are you an assistant professor, associate professor or full professor at one of our participating Dutch universities and interested in spending some research time in Cairo working in the inspiring and stimulating environment of NVIC? We participate in the NWIB Visiting Professors Programme and have…

With a healthy dose of logic and creativity, mathematics student Lance Bakker shows how computers can prove complex mathematics. His method proves intricate formulas without calculating every intermediate step. It earned him a nomination for the Leiden Science Young Talent Award 2025.

The risk of a brain tumour recurring can be predicted more accurately by counting the number of immune cells in the tumour under a microscope. These are the findings from research conducted by LUMC, Erasmus MC and Heidelberg University.

Leiden researchers have found clues to why a rare pregnancy disorder is mild in some babies but life-threatening in others. Their discovery opens the door to a test that could identify severe cases during pregnancy. Fortunately, a treatment already exists.

Learning to cycle without a handbrake, saying sorry if you're late for a lecture and fathoming out the weird sounds of Dutch. Leiden's new international students get a crash course in Dutch culture during their introduction week.

With this quote in mind, we organised an alumni event in Brussels for those alumni that live and work in the Brussels Area. 67 mostly young alumni - the majority graduated in the years 2010-2019 - showed up at the beautifully renovated Holland House, situated near the lively Place du Luxembourg (better…

Happy students and proud families, friends and lecturers; on 13 July the first fifteen refugee students graduated from the Preparatory Year for teaching in Leiden. They started a programme in September at a Dutch university of applied sciences or an academic university. 'This is just the start!'

At the beginning of the corona pandemic, our Faculty appointed student mentors to guide first-year and international students. What drives these mentors, and what is it like to be back at the Faculty again? Mireia and Marten tell us all about it.

This year will see the start of not one but two citizen science projects in Leiden and The Hague. This is the outcome of a large survey among residents and researchers in both university cities. The Citizen Science Lab will help the winners implement their ideas, with support from the University and…