Aesthetic attraction plays a big role in orangutans’ mate choice, behavioural biologist and PhD candidate Tom Roth has observed. But to discover just how big that role is, more research is needed into the emotions of the great apes.

The UN has christened 21 November World Philosophy Day, a day on which ‘the enduring value of philosophy for the development of human thought, for each culture and for each individual’ is celebrated. But how should we celebrate it? We ask philosopher Victor Gijsbers.

Last semester, bachelor’s students in Religious Studies spent a lot of time in community centres in Leiden. The reason: field research into loneliness in the city.

A live online New Year’s event on Tuesday 12 January marked the start of the New Year. Dean Joanne van der Leun toasted 2021 and as usual at this event, the annual Meijers prizes and thesis prizes were awarded.

Second-year MIRD students showcase their thesis research on global issues during the 2025 Thesis Symposium, bridging theory and diplomatic practice.

More than 300 students received their Bachelor’s Diploma of International Studies on 31 August 2018.

325 students received their Bachelor’s Diploma of International Studies on 30 August 2019. The students received their diplomas in the historic Pieterskerk in Leiden, in front of a large audience of family and friends. With more than 1100 people present, including 325 graduates, this was the largest…

It’s Saturday and electric minibuses ride back and forth bringing prospective students to Leiden University’s various faculties. They want to see for themselves whether that interesting-looking programme will suit them.

On Friday 29 August 2025, 370 students received their Bachelor's degree in International Studies. The diplomas were awarded in the historic setting of the Pieterskerk in Leiden. Family members, friends, and staff gathered to celebrate this joyous occasion with the graduates in a packed Pieterskerk.

It's easier to understand Trump's America if you have a sound knowledge of the country's history. Research on the US has been given an impetus with the renewed Roosevelt Institute for American Studies. The institute in Middelburg reopened on 20 April with Leiden University as a key partner.

“United Nations peacekeeping is a proven investment in global peace, security, and prosperity. Together, let us pledge to do all we can to enable that mission to succeed”. – Secretary-General António Guterres

Anyone who wanted to get an impression of the Dutch East Indies between 1800 and 1945 quickly turned to travel literature. Large groups of readers devoured non-fiction accounts of the island empire on the other side of the world – and were given a one-sided picture. Most of the sources that reached…

On 25 February more than 6,500 prospective students will visit the Open Day to learn more about programmes in Leiden and The Hague and to get a taste of student life. Have you signed up yet? Five golden tips to make your Open Day a success.

More than 3,500 enthusiastic Leiden first-years, 80% of them coming to Leiden University, gathered on Monday morning 13 August at the Lammermarkt for the start of the EL CID. Music booming, the groups gathered around their mentors in two shifts, at 9.30 and 11.30.

This year, Leiden University College (LUC) celebrates its 15th anniversary with the theme ‘Global challenges, local impact’. This theme highlights how LUC tackles global issues through education and research while making tangible contributions to Dutch society

On Friday 10 December 2021, the Center for Law and Digital Technologies (eLaw) of the Leiden Law School, hosted its annual Research Colloquium exploring the theme 'Law Gone Digital'. The event gathered presentations by eLaw PhD candidates and professors on a wide range of topics at the interface of…

The LUMC has become the first institution in the Netherlands to treat a patient with an autoimmune disease using CAR T-cell therapy.

The Hague Court of Arbitration for Aviation (The Hague CAA) successfully marked its official debut conference with the support of partners, which include Leiden University's International Institute of Air and Space Law (IIASL), the Netherlands Arbitration Institute (NAI), and the Municipality of The…

Netherlands and China can learn from each other to handle household and livestock wastewater more sensibly. In the FOREWARD project, scientists from Leiden, Wageningen, and China are working together with local partners on feasible solutions that advance the environment, health, and economy.

On September 5, at the festive opening of the Faculty Year, a range of new murals will be officially presented in the Van Steenis’ Reuvens Hall. The wall paintings reflect a variety of Dutch soil stratigraphies, from Oss to burial mounds. Aside from being a striking new addition to our Faculty building,…

Are you interested in expanding your knowledge on the Dutch crisis management system? Leiden University is organising a unique lecture series on the subject in collaboration with the Netherlands Institute for Public Safety (NIPV). The lectures will take place on 22 April, 13 May, and 3 June.

The Du Châtelet Prize in Philosophy of Physics is awarded annually for previously unpublished work in philosophy of physics by a graduate student or junior scholar. The prize celebrates excellence in philosophy of physics, and promotes breadth across the field both historically and philosophically.

On 17 February 2024, Leiden University's Scheltema building was abuzz with the energy of the annual MSc International Relations and Diplomacy (MIRD) Re-Connect Gala. This year's event marked a joyous return to in-person gatherings, bringing together 200 students, employees, and esteemed alumni of the…

A star does not just appear in the sky overnight. Its creation takes tens of thousands of years. Twenty years ago, astronomers took a picture of a star in its birth phase. The James Webb Space Telescope (JWST) could now capture that same star in much greater detail. This does not only provide beautiful…

The Surinamese-Dutch language, Parbo Beer and, of course, football. The ‘Dear Aunt Olga’ (‘Lieve tante Olga’) exhibition focuses on the shared Surinamese-Dutch culture. Full of cheer and with life experience to spare, ‘icon’ Aunt Olga (95) leads visitors through a shared history and does not shy away…

On 22 March, five days after his final attendance at the Lucia de B case, Professor of Statistics, Richard Gill, will be appointed Distinguished Lorentz Fellow 2010-2011. To mark the award, Gill is organising a breakfast symposium on the relations between the media, science and law.

NWO has awarded a VIDI grant to Alex Geurds for his research proposal entitled Networked practices of contact: Cultural identity at the Late Prehistoric settlement of Aguas Buenas, Nicaragua, AD 500-1522. Geurds will investigate material culture exchange along the frontier of the Mesoamerican and the…

Lifelike gods, provisional professors and the city militia with weapons a clanking. Leiden put on a colourful procession and drummed up hundreds of citizens to celebrate the foundation of the first university of the Republic of the Netherlands on 8 February 1575. 'It wasn't a party just for the sake…

The person who cried out at Dam Square on Remembrance Day in 2010. For Michiel van der Wolf this marked the rise of a new phenomenon: that of ‘confused people’. Because since that Remembrance Day, the number of reports of ‘confused people’ in the Netherlands has increased rapidly in the statistics.…

He could also have written a paper for his honours assignment,

From 24 to 28 June the 7th edition of Leiden University’s annual Frontiers of Children’s Rights Summer School took place in Leiden and The Hague.

Psychologist Aukje Nauta studies what makes people feel better in an organisation. For many, this ‘organisation’ is now the family; for those who live alone, this organisation has disappeared completely. What are the implications and how can a single person deal with possible problems?

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…

On 3 and 4 November 2022, Melanie Fink convened a Workshop to bring together the authors of an Edited Volume on ‘Access to Justice and the EU’s Remedies System’, to be published in early 2024 by Cambridge University Press.

Artificial Intelligence (AI) is a technology that often puts women and minority groups at a disadvantage because it tends to be developed by straight white men. What if that changed and women were the driving force behind AI? This is the thought experiment at the heart of Maaike Harbers’ Annie Romein-Verschoor…

The annual Korean Screen Culture Conference (KSCC) is dedicated to exploring all aspects of Korean screen culture, including television, K-pop, internet, computer gaming, webtoons, and film from both North and South Korea.

Arjan Louwen (MA) will start a PhD research project on the social and ideological aspects of Late Bronze Age and Early Iron Age cremation graves in continental Northwest Europe (1100-500 BC): Breaking and making the ancestors. Making sense of the inconspicuous 99% of urnfield graves.

As both old and new democracies experience increasing democratic backsliding, there is a critical societal need to rethink the design and effectiveness of democratic checks and balances. In this conference on Friday 9 June, the aim is to explore multidisciplinary insights about what makes the checks…

The monthly ILS Lunch Seminars unite the several Institutes situated within Leiden Law School. On Thursday 15 February 2018 from 12:00 hrs until 13:00 hrs in KOG B0.41, the next edition of the ILS Lunch Seminars will take place.

Historians have long known that Catholics played a significant role in the Revolt of the Netherlands (1520-1635). But what did the Revolt mean to individual Catholics? Professor of Early Modern Dutch history Judith Pollman has published a book on the subject.

He is primarily known for his protest speech against the dismissal of his Jewish teacher Eduard Meijers, but who was the man behind this iconic figure? This is the subject of the travelling exhibition 'On the trail of Professor Rudolph Pabus Cleveringa’. The exhibition can be seen from 16 January to…

Antoni van Leeuwenhoek, the father of microbiology, died 300 years ago. 2023 has therefore been designated the Antoni van Leeuwenhoek year. The new Unimaginable exhibition in Rijksmuseum Boerhaave is about the amazing world that Van Leeuwenhoek made visible. What was so special about the way he worked?…

On Friday 9 September, Jeanin van Hooft, Professor of Gastrointestinal and Liver Diseases, will deliver her inaugural lecture titled: 'The scope of connection'. She emphasises the value of collaboration and connection for scientific research. In addition, she pleads for more diversity; according to…

Covid-19 has transformed Africa Knows! into a unique international knowledge-sharing event: it will now be a three-month online event instead of a physical conference lasting just a few days. Senior lecturer and co-organiser David Ehrhardt is eager to find out how successful this format will be. The…

Individuals suffering from social anxiety disorder (SAD) consistently avoid eye contact. However, in a non-clinical population, gaze avoidance in socially anxious individuals depends on social situations, Jiemiao Chen saw in a series of experiments, for which she used wearable eye-trackers. On 25 April…

Prof. dr. ir. Bas Rietjens of the Dutch Defense Academy (NLDA) has been appointed Professor by special appointment Intelligence in War and Conflict at Leiden University’s Institute for Security and Global Affairs (ISGA). The appointment of Rietjens is the result of a more intensive collaboration between…

The night side of exoplanet WASP-43b, to the surprise of astronomers, does not appear to contain methane. It is likely that extreme winds do not allow enough time for methane to form in detectable amounts. This is the conclusion of an international team of scientists, with Leiden and Amsterdam contributions,…

The association agreement between the EU and Ukraine is highly important for peace in Ukraine, and it is therefore essential that Europe weathers these difficult times. These were the words of Ukrainian President Petro Poroshenko on 27 November during his Europe Lecture at Leiden University.

After a turbulent first year as assessor, Jonatan Wirix-Speetjens starts a second term in September: 'In my second year as assessor I hope to become really decisive’, says Jonatan. We asked him about his experiences the past year and his plans for the coming academic year

Can we reshape school playgrounds through data and design? By using AI and wearable sensors, data scientist Maedeh Nasri discovered ways to create environments where children, including those with ADHD and autism, can connect, play, and grow.