This 25th volume in the series 'Islam in Africa', edited by Annachiara Raia, is a pioneering collection of poetry by the outstanding Kenyan poet, intellectual and imam Ustadh Mahmmoud Mau (born 1952) from Lamu island, once an Indian Ocean hub, now on the edge of the nation state.

In this thesis it is posed that the central object of preference discovery is a co-creative process in which the Other can be represented by a machine. It explores efficient methods to enhance introverted intuition using extraverted intuition's communication lines.

On 9 June 2020, Maral Darouei defended her thesis 'Managing a sustainable career in the contemporary world of work: Personal choices and contextual challenges'. The doctoral research was supervised by Prof. J.I. van der Rest.

Archives were a common target during the Second World War, and hundreds suffered damages. Among these archival losses, the losses to medieval manuscript collections stand out.

The main question addressed in this thesis is how we can best conceive the contrast between a priori and empirical truths.

Migration is the talk of the town. On the whole, however, the current situation is seen as resulting from unique political upheavals. Such a-historical interpretations ignore the fact that migration is a fundamental phenomenon in human societies from the beginning and plays a crucial role in the cultural,…

What are best practices for teaching students to engage with 'wicked' problems?

Hot rocky exoplanets are planets that orbit so close to their host star that they possess a molten surface.

Promotor: Carel J. ten Cate, Co-Promotor: Hans W. Slabbekoorn

On Wednesday 3 September 2025 Yu Ai successfully defended a doctoral thesis and graduated.

This dissertation investigates how the efficiency of Computed Tomography (CT) can be improved for dynamic scientific and industrial applications.

Professor Sarah de Rijcke will become the new Rector Magnificus on the Executive Board of Leiden University on 15 January 2026. She will succeed Professor Hester Bijl, who will become Rector Magnificus at Delft University of Technology.

With the passing of Henk Jan de Jonge on 16 April 2022, Leiden University has lost one of its most characteristic, learned and devoted professors.

Inaugural lecture

The American Association of Pharmaceutical Scientists (AAPS) has been pleased to announce Dr. Elizabeth de Lange as a recipient of the 2013 AAPS Fellows Award at the 2013 AAPS Annual Meeting and Exposition in San Antonio.

In the theme of Big Cat Month, National Geographic interviewed Professor Hans de Iongh, guest researcher of the Institute of Environmental Sciences (CML) about lion conservation in Africa.

Professor Nivja de Jong has been included in the list of most influential scientists by Elsevier Data Repository. This list of scientists with the highest impact is compiled annually based on citations. De Jong appears on the annual list for the third consecutive time.

Understanding the evolving landscape of extremism in the 21st century.

We are very happy to announce that as of 1 March Marleen De Meyer is our new NVIC Director!

An international research consortium led by Bob van de Water, Professor of Toxicology at Leiden University, has been awarded a prestigious Horizon2020 grant of 30 million euros.

After eight years as professor at the Institute of Psychology, Carsten de Dreu is making the move to the University of Groningen, where he has been appointed to the chair ‘Foundations of Cooperation and Social Organisation’. On 18 June, he will bid farewell to colleagues at Leiden University.

On 4 May, Leiden University remembered the victims of the Second World War from our university community. Alumni, students and present and former staff of the University came together for this Hour of Remembrance.

For the first time, a court has ordered a company to reduce its carbon dioxide emissions. Lawyers see it as a landmark ruling that will have far-reaching consequences for Shell and possibly also other similar companies.

Since the attack of 22 may 2017 in the Manchester Arena, we have often seen the term ‘soft target’. Jeanine de Roy van Zuijdewijn, researcher at the Institute of Security and Global Affairs, took part in a Q&A about the attack in Manchester.

Russia is required to pay billions of dollars to shareholders of Russian oil company Yukos. This was decided by the appeals court in The Hague.

Jaap de Hoop Scheffer, Professor of International Relations and Diplomatic Affairs at the Institute of Security and Global Affairs, says we must block and expel Putin wherever possible.

The exhibition Leiden celebrates – 450 years of parades at Museum De Lakenhal shows how parades and society have changed through the centuries. Alumnus and historian Danielle van Goethem worked on the exhibition. She gives a preview.

On 18 June, 2015, Erik Kwakkel was elected to the Comité International de Paléographie Latine (CIPL), a scholarly committee that specialises in the study of the medieval book.

What started as a student project in the Media Technology program, became a successful internationally operating company offering therapeutic virtual bike rides. Meet alumni Ella Keijzer and Job de Reus, founders and owners of Bike Labyrinth.

Leiden researchers Tazuko van Berkel (Greek and Latin Language and Culture) and Noel de Miranda (Tumour Immunology, LUMC) will join the KNAW’s Young Academy next year. They will be inducted on 22 March 2021.

Nature Reviews Drug Discovery volume 18, pages 82–84 (2019). The implications of target saturation for the use of drug–target residence time Wilbert de Witte, Meindert Danhof, Piet van der Graaf, and Elizabeth de Lange

In Dutch daily Trouw, assistent professor Cyber Security Governance, Els de Busser writes about the importance of good digital safety at companies. Dutch telephone and internet provider KPN is lacking in this respect. ' In Trouw schrijft Els de Busser, universitair docent Cyber Security Governance…

How do young adults find their way in an increasingly complex society? In Leiden, as part of the GUTS project, we study how brain development and self-regulation play a role in this process.

On Sunday, December 10th, at 4:00 PM, the presentation of the book 'Zes eeuwen klokkencultuur in de Abdij van Averbode,' written by Jozef Van Osta, will take place in the Abbey of Averbode. More information can be found in the invitation.

Open Access means shared responsibility for research programs. An interview with Prof. Huub de Groot for the Leiden Open Access Blog in the scope of the International Open Access Week.

It is with great sadness that we announce the passing of our director, Dr. Rudolf de Jong. We extend our deepest condolences to his loved ones. The Institute will be closed the coming week in mourning. Details of a memorial in Cairo will follow soon. Rest in peace, boss. We will miss you.

A European consortium has provided a disruptive technological breakthrough to allow the discovery and characterization of novel enzymes for industrial biotechnology. The technology will open the way to more efficient industrial processes such as in the biofuel, animal feed and paper and pulp industr…

Dennis Broeders, professor of global security and technology at ISGA (Institute of Security and Global Affairs), together with two partners, has been granted a major European project: EU Cyber Direct. Together with EU ISS and Carnegie Europe, ISGA forms a new consortium for 3 years with a total budget…

Various Leiden researchers have been awarded a European grant to explore the commercial or societal potential of previous research.

During the farewell reception on 29 August, the Faculty of Science will say goodbye to Dean Geert de Snoo. On 1 November 2019, he will continue his career as Director of the Netherlands Institute of Ecology (NIOO-KNAW). Colleagues talk about his significance for ecology, about his contribution as a…

Gesloten jeugdhulp moet afgeschaft worden, zei Jason (21) onlangs in de landelijke media. Zelf zat hij ruim een jaar in meerdere instellingen voor gesloten jeugdhulp, maar hij werd er naar eigen zeggen niet beter van. Promovendus Maria de Jong-de Kruijf onderzocht het hoe en waarom van deze vorm van…

As a twelve-year-old girl, Nicky van de Beek became intrigued by the tomb chapels in Saqqara, Egypt. Now she is doing her PhD on them, just like another Leiden Egyptologist decades earlier. Herta Mohr persevered with her research during World War II. Now she is the namesake of the first Leiden building…

This new handbook by Frits Naerebout and Henk Singor places the history of the Greeks and Romans within the larger context of the contemporary Eurasian world.