Specific fatty acid-sugar molecules allow leprosy bacteria, among others, to hide from our immune system. How exactly is not entirely clear. Hessel van Dijk, who received his PhD on 13 October, replicated the molecules, helping to solve a piece of the puzzle. Van Dijk's dissertation is titled: Synthesis…

Every two years, students from Leiden University go into the Malaysian rainforests of Borneo. There they speak with Malaysian people to discover the use of plants or learn a local fishing technique. Improvising in the jungle leads to fruitful, creative, and important research.

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.

Practicum Artium is a joint programme by Leiden University and the Royal Academy of Art (KABK) that offers students the opportunity to develop their artistic skills. Due to the pandemic, this year’s exhibition will take place online so we asked a few of these talented students about their experience…

Mariana Françozo has been awarded a Starting Grant by the European Research Council. With this 1.5 million euro grant Dr. Françozo and her research team will investigate the transformation of the knowledge of diverse Brazilian indigenous peoples into a body of knowledge that became part of the Western…

Environmental scientist Alexander van Oudenhoven has been chosen as Discoverer of the year of the Faculty of Science. Vice Rector Magnificus Hester Bijl announced this during the faculty’s New Year’s Reception on 10 January. Biologist Changsheng Wu won the prize for best dissertation of 2016. Computer…

Today, ESA’s Gaia mission releases its new treasure trove of data about our home galaxy. Astronomers, led by the Leiden astronomer Anthony Brown, describe strange ‘starquakes’, stellar DNA, asymmetric motions and other fascinating insights in this most detailed Milky Way survey to date.

Large pairs of planets thought to orbit each other without a star, do not exist after all. That conclude Leiden researchers, after extensive computer modelling and simulations. What the double dots seen by the James Webb Space Telescope are, remains a mystery.

Members of LUCAS work in various buildings on the Witte Singel-Doelencomplex. The board and the secretariat are housed on the first floor of the P.N. van Eyckhof 3 (building 1165).

Minims are letters that are made up of short, vertical pen strokes, such as 'm', 'i', 'n' and 'u'. In Gothic script, there is often little distinction between letters composed of minims. Assistant professor of medieval literature Krista Murchison has written an article in History Today on the hidden…

On Saturday 17 September Leiden will once again be the setting of the Night of Art and Knowledge. Come along and enjoy a fascinating mix of knowledge, theatre, music and art in the museums and academic locations such as the Hortus botanicus. Tickets are now on sale.

On Monday-Wednesday 10-12 June 2019, Jeroen Wolbers, Wout Broekema and Sanneke Kuipers represented the Institute of Security and Global Affairs (ISGA) at the fourth edition of the Northern European Conference on Emergency and Disaster Studies (NEEDS).

It is still not easy to ‘come out’ about your sexual orientation or gender identity. On Coming Out Day (11 October), the issue was the focus of global attention. This year, instead of the traditional rainbow flag, the ‘progress pride flag’ flew above University buildings.

An overview of awards and prizes granted to our staff and students in 2021, as well as special appointments at Leiden University and other institutions.

The research group Intelligence and Security has been augmented with a team Policing Studies as part of the collaboration agreement with the Dutch National Police. This team is tasked with creating a more academic foundation for the current knowledge surrounding policing studies in the Netherlands,…

PhD defence

PhD defence

Erik Kwakkel, researcher at the Faculty of Humanities, has found an extraordinary manuscript in the University Library’s extensive collection of medieval books. The book in question dates back to the first half of the eleventh century and is made entirely out of waste left over from the production of…

At the end of the 7th century something curious occurs in Northwestern Europe. Suddenly, people start burying the dead next to their dwellings instead of in communal cemeteries. Professor Frans Theuws recently published a book on this phenomenon. ‘We wanted to know if the study of these farmyard burials…

Planets existing in other solar systems contain invaluable information about the origin of planets and life. PhD candidate Yapeng Zhang has studied their atmospheres by looking at their smallest parts: isotopes. With her research she hopes to discover what makes our own solar system unique.

Isabel van Vledder and Dieuwertje van der Vlugt, 2 astronomy students from Leiden University, have mapped the entire Milky Way galaxy in dwarf stars for the first time. This result is the most comprehensive model ever for the distribution of these stars. The findings appear in a new paper in Monthly…

Every Political Science master’s student at Leiden University completes their degree with thesis. The thesis provides students with the opportunity to pursue a topic of their choosing in depth and conduct independent research. It is a demanding task that requires dedication, attention to detail, and…

The second authors' conference of the General Labour History of Africa (GLHA) project will be held from 10 to 12 December 2015 in Dar es Salaam, Tanzania.

Northern lights, stellar winds and exoplanets. This is what astronomer's PhD research revolved around. PhD candidate astronomer Rob Kavanagh developed mathematical models to better understand the interactions between exoplanets and stellar winds and to define features of exoplanets. He will receive…

More than 700 visitors got to know the Science Faculty during the Leiden Science Family Day. People of all ages could enjoy fascinating experiments, tours, interesting lectures, spectacular nitrogen shows and various workshops. It was an informative day with many (future) scientists, amazement and,…

Topology is an emerging field within many scientific disciplines, even leading to a Physics Nobel Prize in 2016. Leiden physicist Marcello Caio and his colleagues have now discovered the existence of topological currents in analogy to electric currents. Publication in Nature Physics on January 14th.

How can Europe lead the way in vaccine development that is fast and for all? To answer this pressing question, Professor of Vaccinology Meta Roestenberg is holding a panel session on 14 July at the EuroScience Open Forum in Leiden.

Hermelijn Smits is Professor of Host-commensal Interactions and Immune Modulation. In this role she is increasing our current understanding of the way in which microbes and parasites shape our immune system to protect us from respiratory infections and chronic inflammatory diseases. In her inaugural…

Rachel Schats has been a familiar face at the Faculty of Archaeology since she started her bachelor’s in Archaeology in 2005. Now she is an assistant professor, working on her Veni project on malaria in the Middle Ages. ‘I have included in this project so many skeletal collections that no one has ever…

Plants can’t run away from enemies. Still, it would like to keep life-threatening herbivores at a distance. This can be done with odours. Klaas Vrieling of the Institute of Biology Leiden found out with his team how plants change odour production to keep the munchers at a distance.

Dutch mosquitos are more resilient to saltwater than previously thought. Environmental scientist Sam Boerlijst discovered this during his PhD research at the Hortus botanicus. This knowledge is crucial for understanding how mosquito-borne disease transmission might change in the future.

The university is home to many pearls of research institutes that do not make the news every day. The Executive Board visited one such pearl, the Institute of Philosophy, on Tuesday 1 July. It resulted in an inspired conversation.

For many students, a summer school abroad is a fun and useful way to spend the summer. This year, because of the travel restrictions, many summer schools were held online. There was no less interest from students though. What is it like to study in a different country, but digitally? Or to travel abroad…

In the nationalist nineteenth century, people developed an interest in medieval language and literature. The study of medieval material in one’s own vernacular was thought to reveal a great national past. But why, then, was Old English studied by Germans, Danes, Italians and many other nationalities…

Just about everything that's known about Charles Darwin has already been said or written. Even so, Norbert Peeters – together with Tessa van Dijk – has managed to write an original book about the great English scholar. In the run-up to Darwin Day (12 February) he tells us about his new book.

One of them turned out to be two thousand years old. And older giant barrel sponges appear to have a faster rate of cell division, unlike us. They produce antibiotics and much, much more. Lina Bayona Maldonado studied how the differences in such factors as age or oceanic depth affect the production…

Lecture

With cultural anthropology alumnus Jeroen Windmeijer, Leiden has added another writer to the fold. Following the success of his religious-historical thrillers, he has been able to call himself a full-time writer since 1 January 2019. ‘Not a true story but still true.’

It’s only been six years since bestselling author Jeroen Windmeijer (56) decided to become a full-time writer. Since then, he’s put Leiden and the university on the map with his gripping thrillers. From his desk on the Rapenburg canal, he now travels the world with his steadily growing body of work.

Not one but two openings: the minister who defended her plans and many who emphasised the importance of standing together with the arts and social sciences: the opening of academic year 2019-2020 in Leiden was not without event.

Bezoek

Lecture, Astronomy on Tap

Lecture, Leiden University Environmental Humanities Series

This research project focuses on the extended documentation and investigation of these non-Austronesian (‘Papuan’) languages.

De klimaattransitie is in volle gang: de vervuilende industrie moet plaatsmaken voor duurzame productiemethoden. Werknemers in deze industrie zullen hierdoor nieuwe banen moeten vinden. Dat zal niet iedereen lukken. Heb oog voor die groep, waarschuwt politiek econoom Lars van Doorn.

On Prinsjesdag, 16 September 2025, the Faculty of Governance and Global Affairs (FGGA) opened the new faculty year with a reception at Wijnhaven. The opening was dedicated to the university’s lustrum theme: ‘Ahead of Time’.