What is dark matter? How do supermassive black holes form? ‘Primordial’ black holes might hold the answer to these long-standing questions. Leiden and Chinese cosmologists have identified a new way in which these hypothetical objects could be produced just after the Big Bang. Publication in Physical…

City dwellers in the Middle Ages were probably no worse off than people living in villages. Both groups had very different health risks, is Rachel Schats' conclusion from her research on bone material. PhD defence 3 November.

The train to The Hague holds no secrets for Jeroen Touwen anymore. Since October, the Vice-Dean of the Faculty of Humanities has been part of the board of Campus The Hague. One day a week, together with Jan Crijns (Professor of Criminal Law and, as of February 15, Vice-Dean of the Law Faculty), he oversees…

An international team of researchers led by astronomers from Leiden University (the Netherlands) has produced the first sharp radio maps of the universe at low frequencies. Thanks to a new calibration technique, they bypassed the disturbances of the Earth's ionosphere. They used the new method to study…

A banker who puts making money second and makes a profit nonetheless. A farmer who stops ploughing and using insecticides but still has a good harvest. A new white paper by Leiden-Delft-Erasmus and Naturalis Biodiversity Center shows how the meeting of disciplines provides solutions to climate change…

For decades, the trade in pocketbooks prescribing how to be a good Muslim flourished in East Africa, but in recent years the number of books in circulation has been declining. University lecturer Annachiara Raia is the recipient of an Impact Explorer grant to revive this tradition, in cooperation with…

The underwater world around present-day Indonesia has changed greatly in recent centuries as a result of human activity. University lecturer Johannes Müller has been awarded an NWO XS grant to map the history of the Indonesian ecosystems.

'We are very happy with this recognition! The great thing about this prize is that it celebrates team effort', Joanne Mouthaan responds to the Casimir Prize for the education project 'E-learning Suicide Prevention'. Colleague Maartje Schoorl calls the prize the icing on the cake of good education in…

A collaboration between linguists, geographers and anthropologists aims to uncover how languages spread across South America over thousands of years. Associate Professor Rik van Gijn is responsible for the linguistic side of this NWO project.

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Below thesis archives will be moved shortly (work in progress) to the Leiden Repository. Once this is done, theses submitted by MI students (from 2008 onwards) can be accessed via the Repository and will be removed from this site.

PhD candidate Vincent Walstra reflects on alternative social interactions and mutual aid in the city of Rotterdam during the first wave of the Covid-19 pandemic.

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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;…

The government, the people and the country were in desperate straits. This about sums up the state of affairs in the Disaster Year of 1672. It was 350 years ago, and to mark the occasion PhD candidate Roosje Peeters collaborated on a series of letters to and from a key political figure Johan de Witt,…

From one year to the next, face masks have started to appear in the environment. As the masks are discarded, they end up in the top soil, in sediment layers, and in refuse heaps. In a couple of generations archaeologists will study the layer that has already been labeled the Face Mask Horizon. Current…

Climate change is a hot topic and constantly in the news. Thousands of Dutch high school students protested at the Malieveld in The Hague. News website Nu.nl has barred climate change deniers from their comments section to prevent ‘fake news’. How does climate change impact the research community, and…

Space telescope Euclid is capable of unravelling the secrets of the universe. That is what the images published by ESA today show, according to astronomers working with the telescope's data. The images exceed all expectations. Scientists within the Euclid consortium, including astronomers Henk Hoekstra…

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PhD defence

Lecture, Lunch Research Seminar

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Lecture, LUCL Colloquium - Series '24/'25

Lecture, Descriptive Linguistics Seminars

An overview of awards and prizes granted to our staff and students in 2020, as well as special appointments at Leiden University and other institutions.

What happens to the different waste streams?

The Leiden University Medical Anthropology Network (LUMAN) brings medical anthropologists together with the aim of fostering interfaculty collaborations and creating common ground for working interdisciplinary on health-related themes in Leiden and beyond.

Disclaimer: Manuscripts related to the Resilience Center are for academic purposes only and are not intended for mass distribution or copying. Please refer to applicable laws for fair use, including copyright holders' restrictions on publications.

The development of space resource activities is happening now. In the absence of a clear framework to govern these activities, there is a need to examine the concepts that are being discussed in order to ensure that they meet existing treaty obligations regarding on-orbit operations and space resource…

Antwoord op veelgestelde vragen over onderzoek met proefdieren bij de Universiteit Leiden. FAQ

Connect art and academia at ACPA

PhD defence

PhD defence

PhD defence

The world’s prosperity and well-being are seriously being threatened by the degradation of land and nature. Although there are opportunities to turn things around, fears of further deterioration in the coming decades must not be taken lightly. That is concluded at the Intergovernmental Science-Policy…

Algae are not what immediately spring to mind when people think of threatened species. But even among algae there are species that have a difficult time, such as ‘Aegagropila linnaei’. In the magazine BioScience Christian Bödeker describes the worldwide decline of this species. He calls for the species…

A plant that takes metal from the ground all by itself: a natural way to mine or to clean the soil. PhD student Roderick Bouman (Hortus Botanicus Leiden) described a new plant species from Sabah, Borneo, which can be used to extract nickel. In an open access article in Botanical studies, he and the…

On February 1st Cristina Grasseni started as Professor of Anthropology at the Institute for Cultural Anthropology and Development Sociology. She is bringing the ERC Consolidator project ‘Food Citizens?’ with her to Leiden. A few questions to get to know the new professor.

More than 80 percent of the EU’s agricultural subsidies go to the production of animals or animal feed. These products are responsible for 84 percent of the EU’s food-related greenhouse gas emissions. That is revealed in a new study by three Leiden researchers published in Nature Food. ‘If we continue…

Measurements on a superconducting material show an abrupt transition between a normal metal and a 'strange' metal. The really strange thing, however, is that this abruptness disappears when the temperature falls. 'We don't have any theoretical machinery for this', says theoretical physicist Jan Zaanen,…

The relationship between academia and democracy is a complicated one. Should policy makers listen to scientists or to citizens? That is the dilemma Valérie Pattyn and Johan Christensen will discuss with a panel of experts during the academic conference EuroScience Open Forum (ESOF).

Robbert Striekwold started his PhD project at LUCAS and Naturalis Biodiversity Center in March 2016. His PhD project is part of ‘A New History of Fishes; a long-term approach to fishes in science and culture, 1550-1880’, a project directed by Paul Smith.

The Member States of the European Union do not intervene when a Member State disrespects the values of the European Union, Judith Sargentini, member of the GroenLinks party at the European Parliament, said at the annual Europa Lecture on 9 May in the Lorentzzaal of the KOG Building.

A team of developmental psychologists and educators are involving young people in the communication about brain development. A second team of Leiden neuroscientists conducts research into music and spatial skills and searches for healthcare applications. Both teams were awarded a sum of 10,000 euros…

How do you offer proper education in times of corona? Annebeth Simonsz (Educational Advice and Quality Assurance) and Anna Benjamins (ECOLe) work closely together to support lecturers in hybrid and online education. They are happy to share with the faculty, lecturers’ creative solutions for the new…

‘Visibility and secrecy are both valuable tactics and should not be antagonized in LGBT movements, ’ says Jingshu Zhu. Zhu will defend her dissertation on Wednesday 21 February. Time for a short interview with the PhD candidate.