The peacekeeping operation in Cambodia is known as an important and rare success. Yet the mission was forced to violate the core principle of peacekeeping, impartiality, in order to be successful.

Jorge Heine writes about 'bricks-and-mortar' diplomatic posts and their significance during a pandemic.

Promotores: S.F. Portegies Zwart, E. M. Rossi

Promotores: Prof.dr. A.G.G.M. Tielens & Prof.dr. L. Kaper (UvA)

Missiles that travel at approximately six thousand kilometres per hour, up to 5 or 6 times the speed of sound. Has Russia used those against Ukraine and how is that possible? In Leiden University’s Dutch video series ‘De Werkplaats’, Danny Pronk, political scientist, security expert, and researcher…

New funding allows IBL-researcher Herman Spaink to purchase a measurement device for more studies on human diseases such as cancer and tuberculosis using zebrafish as the model system.

The prestigious journal Science Translational Medicine has published a study by researchers from the Institute of Biology Leiden (IBL) on a potent new antibiotic that can overcome resistance. ‘The idea was to tweak the original antibiotic and create a next-generation drug’, says Nathaniel Martin, professor…

If PhD candidates encounter problems, they should ask for help early on. If the problem is of an academic nature (in relation to research or teaching), their supervisors are the first port of call. If the issue falls outside the remit of the supervisors, there are several options.

In the 60s and 70s, Black Power groups were also active in the Kingdom of the Netherlands. This is what PhD candidate Debby Esmeé de Vlugt has discovered.

Leiden astronomy Master's student Arend Moerman has received an A+ for his thesis research on the simulation of chaotic interactions of three black holes. The simulations, which he carried out together with his Leiden and Oxford colleagues, show that lighter black holes tend to slingshot each other…

This thesis aims to enhance our understanding of galaxies by testing theoretical models of galaxy formation against observations, particularly in the cases of extreme systems which have been found to have an excess of baryonic mass in their central regions, in the form of either supermassive black holes…

It all started with demonstrations protesting about the death of George Floyd from police brutality in Minneapolis, but the Black Lives Matter protest is spreading like wildfire across the whole of the US. Every day, thousands of people are taking to the streets. We asked American Studies expert Sara…

The death of George Floyd at the hands of the police may have sparked the Black Lives Matter protests in the United States and here in the Netherlands, but they are about more than that alone. We asked Karwan Fatah-Black, a historian who specialises in the Dutch colonial history, for his analysis. ‘We…

Delve into the depths of black hole imaging as anthropologist Rodrigo Ochigame unveils the human decisions shaping its portrayal. Explore four alternative color choices at the 'Towards the Black Hole' exhibit, now showing at Rijksmuseum Boerhaave, Leiden.

An international team of researchers observed the full extent of the evolution of hot gas produced by an active black hole for the first time. As it evolves, the hot gas encompasses a much larger area than previously thought and even impacts objects residing at great distances. Their study is published…

The Sun and all the stars in the night sky reside in the Milky Way galaxy. In the at-rest reference frame of the Galaxy, typical stars travel with velocities of about 100-200 kilometres per second.

Libraries in the Netherlands are removing books that contain references to Black Pete. According to the director of the Public Library Association, a logical and fitting response in the spirit of the times.

How do we account for historical power dynamics when writing new histories of slavery and emancipation? What critical methods can we employ when studying preserved archives and collections? A new book series aims to address these questions. The initiators Karwan Fatah-Black and Ilse Josepha Lazaroms…

Promotor: W. Jaffe, Co-promotor: K. Meisenheimer

The antibiotic EVG7, developed in Leiden, has proven capable of fighting the dangerous gut bacterium C. difficile with only a minimal dose. What’s more, the bacterium is far less likely to return, a major issue with existing antibiotics. The research was published in Nature Communications.

A delegation from Leiden University recently embarked on a knowledge mission to various NGOs, universities and government organisations in Indonesia. New partnerships were formed and important knowledge exchanged, and researchers from Leiden gave guest lectures.

The Career Service Humanities offers assistance while you’re a student and for a year after you graduate! We can help you with:

Leila Zerrougui (born in Algeria 1956) is a legal expert on human rights, justice, and rule of law. She is the current Special Representative of the Secretary-General and Head of the United Nations Stabilization Mission in the Democratic Republic of the Congo (MONUSCO). Before she was Special Representative…

Not everything that comes close to a black hole is swallowed by it. Black holes can also hurl material away, and that chance turns out to be considerably bigger than previously thought. Martijn Oei's accidental discovery and his subsequent research on it earned him a cum laude promotion on 12 Decemb…

He was so disappointed that he couldn't go on that archaeological field trip to the Caribbean, he spent most of his time at his computer working on his dissertation instead. But that didn't keep him from gaming from time to time, a personal passion that ultimately led to his current job. Since February…

The Ager Venusinus Project studies the relatively small number of recognized colonial dwellings dated securely to the period of colonization (i.e. the 3rd century BC). With a special interest in the Black Gloss ceramic typochronology

A new paperback edition of Brian Heffernan's book Freedom and the Fifth Commandment. Catholic priests and political violence in Ireland, 1919-21 was published by Manchester University Press in September 2016.

Touring the campus, meeting current students and taking part in an interactive seminar in the Lipsius building. After 1,5 years of online events due to the corona pandemic, a live Student for a Day took place again on Friday 24 September.

George Floyd's death still leads to fierce protests against police violence and racism on a daily basis in the United States and abroad. We asked Paul Wouters how he experiences these developments and what this will mean for our faculty.

On 8 March, Daniel Peat will speak at the 1st Annual Conference of the newly-established NATO Mission Appeals Tribunal (MAT), to be held in Naples.

Psychiatrists in Morocco can't ignore Islam. Driss Moussaoui was one of the first modern psychiatrists in this North African country. He delivered the LUCIS annual lecture on 12 April.

After years of lobbying by environmental activists, a deposit scheme for small plastic bottles is to be introduced on 1 July 2021. One of the leaders in the fight is alumnus Merijn Tinga. The university will have collection points for plastic bottles and is also supporting the Plastic Spotter citizen…

The thesis deals with the study of giant radio galaxies (GRGs), which are radio galaxies of megaparsec sizes.

The Archaeology and Epigraphy of Jordan’s North-Eastern Desert and Beyond

Our information activities can help you make the right study choice. Throughout the year you can get to know Leiden University, our bachelor's programmes and student life in Leiden and The Hague in various ways.

The orbits of 27 stars orbiting closely around the black hole at the center of our Milky Way are very chaotic. As a result, researchers cannot predict with confidence where they will be in about 462 years. ‘That is astonishingly short,’ says astronomer Simon Portegies Zwart who collaborated on the r…

Once it was considered the Switzerland of the Middle East, but today Lebanon is a country deeply affected by the economic crisis, political stalemate and an international context of growing tensions.

Promotor: Prof.dr. S.F. Portegies Zwart

Simulations of galaxies help researchers understand astronomical observations better. The EAGLE simulation, a large project in which Leiden astronomers play a leading role, shows the evolution of the Universe, from just after the Big Bang to the present day.

On Things That Talk, a website founded and developed by Fresco Sam-Sin, students and researchers describe objects from today and from long ago. By now, more than a hundred objects have been covered. Willemijn Waal, Emma Verweij and Frank van den Boom contributed to the content.

Spontaneously helping one another, why do we bother? It is believed that lending a hand to others promotes social bonding, helping us to connect with each other and even build friendships. In our experiment, in which the adult researcher ‘accidentally’ dropped matches on the floor, most adolescents…

The project seeks to come to an understanding of the archaeology of the desert and the ways in which its inhabitants engaged with their constraint, marginal environments through time. It compares and interprets site distribution and community organisation over a long time scale and across several different…

The Netherlands is not particularly rich in ‘wild nature’. Comparatively, what we have is a lot of intensively used agricultural land. This means that from nature’s perspective there much to be gained by combining the ‘nature’ and ‘agriculture’ functions. Not an easy task in such a densely populated…

An Active Galactic Nucleus (AGN) is a highly luminous region at the center of a galaxy, powered by the accretion into a supermassive black hole and emitting energy from radio waves to gamma rays, often outshining the host galaxy.

In this thesis, we use low-frequency and high-frequency radio observations to address the following questions regarding quasars: is the radio loud/quiet quasar dichotomy real?

With the help of software that mimics a human brain, ESA’s Gaia satellite spotted six stars zipping at high speed from the centre of our Galaxy to its outskirts. This could provide key information about some of the most obscure regions of the Milky Way.

Since 2015 the United Nations have declared 11 February the International Day of Women and Girls in Science. Leiden University organized a public event for over a hundred visitors. In between a lecture on the building blocks of life and a talkshow on the impact of science on society, high school students…

Only the fittest cyclists stand a chance of taking yellow in the brutal Tour de France. Team Jumbo-Visma is working with data scientists from Leiden. They have analysed the stages and performance of Jumbo-Visma’s riders in previous Grand Tours. And they are researching how to determine the fitness level…