During the Cold War, 35 states sat down at the table and negotiated for three years – with results. Lecturer Kai Hebel sees the Helsinki Final Act (1975) as the inspirational example of successful negotiations between hostile states.

Information provided by the Tax and Customs Administration is something that concerns every citizen. So it is not surprising that the Tax hotline receives around 10 million calls each year. The Benefits Affair emphasised the citizen’s perspective in communications with the Tax and Customs Administration.…

Hundreds of thousands of Dutch people suffer from pain caused by knee osteoarthritis and the number is rising fast. Prof. Jaap Harlaar specialises in clinical biomechanics. His research is helping improve osteoarthritis treatment. Harlaar has been appointed Medical Delta Professor and now holds posts…

Learning about the newest communication technology in China and solving a business case at telecom giant Huawei. Four Leiden science students get to know China's Silicon Valley.

In his inaugural lecture Professor of Environmental Sustainability Jan Willem Erisman calls for local solutions that give people more freedom in how they meet environmental, nature and climate goals. This would allow farmers to come up with their own solutions to the nitrogen problem. The idea ties…

Almost all the members of the Dutch House of Representatives, ministers and government officials are university educated. At the same time, the large majority of the electorate have a lower level of education, or even no education. How much of a problem is that? Two new books warn about this gap in…

Danny Mekić was presented with the Felipe Rodriquez Award by Bits of Freedom on 13 February. The PhD student won the award for successfully suing X after the social media platform had ‘shadow banned’ him.

An international team of astronomers including Leiden scientists publishes the image of a young star with a surrounding dust disk that is still being fed from its surroundings. The phenomenon around the star SU Aur may explain why so many exoplanets are not neatly aligned with their star. The European…

Alumnus Rennie Roos lives and works in Indonesia. What took him there, what does he do there and what inspires him?

Young people tend to take more risks than children or adults. This trend is related to the reward centre in the brain, which is much more active when they are rewarded, PhD candidate Barbara Braams discovered. Personality, testosterone levels and social context also play a role in risk-taking.

A beautiful speech by vice-dean Bart de Smit, a mini-lecture on exoplanets and the presentation of three faculty awards. That's how we started the new year at the faculty. Together with colleagues and students, we raised our glasses to a new year full of great collaborations, science and education.

Legal philosopher Bart Jansen teaches at universities around the world. In an interview two years ago, he spoke about his professional fascination for dictators and wars. Since then, the world has undergone major changes. High time for a follow-up interview.

Since January the Dutch public have been able to follow a free course on artificial intelligence (AI) and its far-reaching impact on our lives. Leiden scientists Marlies van Eck and Valerie Frissen, from the Institute for the Interdisciplinary Study of the Law at Leiden's Law Faculty, are part of the…

In December 2023, Louise van der Vlugt was announced as Co-Winner of the 'Best Thesis in Jewish Studies' Award. She sat down to answer some questions about her prize-winning BA Thesis.

Starting January 18, the online exhibition Images of the Indonesian War of Independence, 1945-1949 can be viewed via the UBL website. The exhibition is the result of a collaboration between the Royal Netherlands Institute of Southeast Asian and Caribbean Studies (KITLV) and Leiden University Libraries…

In his art, Rafael Martig shows how drastically human activity changes nature. Fieldwork during his studies reinforced this view. ‘On Ameland I found masses of meadow birds, but the greenery on the mainland was often a grass desert.

For a number of years, two ‘boxes’ in the Canary Islands and Chile have been scouring the skies for exoplanets that orbit bright stars. PhD candidate Geert Jan Talens helped develop these ‘MASCARA’ telescopes and has made the first discoveries with them. Together with him, we answer the main questions…

New ministers, new state secretaries and new members of parliament. Around the time of the elections, we often talk about the new faces, but there are also many politicians who leave during this period, sometimes out of necessity. How do you say goodbye to a political career? Henk te Velde, professor…

A microscope with incredible sharpness that leaves samples unharmed – Guido Stam helped develop one. During his PhD research, he combined light and electrons to study biological samples. ‘We can now measure things that simply weren’t possible before.’

What with coronavirus, the American elections and the Brexit botheration, we had almost forgotten that something miraculous happened in 2020: the repressed people of Belarus rallied against dictator Alexander Lukashenko, who has been in power for 26 years. Months later, what remains of the protest?…

Forty archaeology students are holding a shovel somewhat awkwardly in the fields at Oss. This is their first day of fieldwork and they are going to use muscles they didn’t even know they had.

How do opinions form and change in large groups of people? That's not just a sociological question, it's a mathematical one. PhD candidate Federico Capannoli studied opinion dynamics. He defended his thesis on November 19.

Many problems in criminal law can be predicted by the academic world and using knowledge from criminal law practice, says criminal lawyer Professor Patrick van der Meij.

Two statues of gorillas abducting women: they were what led PhD candidate Dick van Broekhuizen to write a new type of history of nineteenth-century sculpture. ‘If you view nineteenth-century art history from a less narrow perspective, the narrative changes completely.’ PhD ceremony on 21 June.

What is the influence of the 2016 ban on free plastic bags on the environment? Industrial ecologist Stefano Cucurachi received a LUF grant of €75.000 to answer this question.

From political confessions to life lessons from his own student time. On 14 March, Prime Minister Mark Rutte gave candid answers to questions from Leiden law students.

Neanderthals were able to make fire on a large scale with the aid of pyrite and hand-axes. This means they could decide when and where they wanted fire and were not dependent on natural fire, as was thought earlier. Archaeologist Andrew Sorensen has discovered the first material evidence for this. Publication…

Better pay and new agreements with streaming platforms: the actors’ strike that brought Hollywood to a standstill a few days ago is mainly about money. But there is something else that film actors are worried about: the increasing use of Artificial Intelligence. Is this fear justified?

How do you really measure how a country is doing? Researcher Annegeke Jansen is looking for alternatives to gross domestic product (GDP) to assess the state of society. As an economist, she focuses on well-being, inclusivity, and a healthier environment. ‘The economy should be a tool to achieve those…

Leiden archaeologists appealed for help from volunteers to search for archaeological remains on satellite images of Utrechtse Heuvelrug, a national park close to Utrecht. The outbreak of the corona virus made the project a resounding success: in a single month, all 300,971 maps had been examined. 'That's…

Does medicine make patients feel better or worse? We are getting better at predicting this from people’s DNA profiles, says Professor Jesse Swen. ‘It never fails to fascinate me how one DNA base pair can have such a huge effect on treatment with medication and the outcome.’

Writing a story from the perspective of a Rwandan girl set in Africa is not an easy task. Alumna Cultural Anthropology Ruth Erica did it. Her debut novel The tree with the bitter leaves, in which an important supporting role is played by a student of cultural anthropology, appeared in August 2020.

On 10 Friday, 'Warm Sweater Day', the central heating in University buildings was set a few degrees lower. Those who are not so warm-blooded could take comfort knowing that there are students who are deliberately keeping the heating turned down the whole winter.

Maurits Berger's new English-language podcast, Matters of Humanities: History of Islam in Europe covers no fewer than thirteen centuries of history. In eight episodes, professor of Islam and the West Maurits Berger argues that the Islam and Muslims are an important part of European history: ‘That was…

The corona crisis has had a major effect on research. Sarah de Rijcke, Professor of Science and Evaluation Studies, and her group research the effects of performance evaluation on the work of ocean scientists. The majority of the fieldwork was supposed to be carried out on ships and at marine labs throughout…

Whether a microbe is beneficial or harmful to a plant can now be predicted with high accuracy thanks to bacLIFE. This bioinformatic tool with an intuitive interface makes it much easier to unlock the secrets of bacterial genomes. A group of Leiden biologists presented it in Nature Communications.

'The kind of knowledge you gain in International Studies can take you anywhere,' says Gaby van de Wal (26, The Hague, The Netherlands), who graduated from the programme in 2018. Her own career path is proof that indeed, an International Studies degree comes with many opportunities.

The bachelor's programme in International Studies is celebrating its tenth anniversary. Ko Voskuilen was among the very first batch of students to follow the study, and Sophia Healy graduated this summer. How do they look back on their time at the university?

Of je nu appt, online nieuws leest, of door Instagram scrolt, jouw gedrag wordt gemonitord. Sterker nog: wát jij ziet, wordt door anderen bepaald. Promovendus Aleksandre Zardiashvili onderzocht de impact van online advertenties en de macht van de bedrijven erachter.

Now that the Herta Mohr building is fully operational, construction work is moving to the other side of the University Library. Over the coming years, the former Matthias de Vrieshof will be transformed into the Aleida Nijland building. Architect Bart van Kampen tells us more about the plans.

Thousands of school leavers came to Leiden between 29 March and 1 April to experience what it's like to study at university. Students at the Criminology and Psychology departments share their experiences. 'I know the subject I want to study, but I'm not sure about the university. That's why I'm here…

Exclusion elicits the same response in children as in adolescents and adults. That is what psychologist Mara van der Meulen found when she studied brain activity in primary schoolchildren. ‘What is new for us is that it is the same in childhood as later in life.’ Doctoral defence on 10 December.

A tenacious postdoc researcher persuaded Professor Marc Koper to research the oxygen reduction reaction. In Koper's eyes, there was little of interest there. But they promptly discovered a whole new way to improve fuel cells on hydrogen and oxygen. Their article appeared in Nature Catalysis on 07 Ju…

You may have noticed this happening more often: your municipality sends you an online questionnaire to find out your opinion on the renovation of a certain area or the design plans for a new district. But how inclusive are these online platforms where citizens can participate in decisions on government…

That was the question physics and mathematics bachelor’s student Daan de Bos set out to explore during his thesis research. Applying machine learning theories to materials presented several challenges, but his efforts led to a working theory that can now be tested on real materials in laboratories.

Should the background of the painting remain blue or be restored to its original gold colour? PhD candidate Liselore Tissen will be using 3D prints and eye-tracking software to answer this question. NICAS is giving her a grant of 18,000 euros to accomplish this.

When Floris Harm took up his role as director of the Leiden Asia Centre, he made a remarkable discovery on the university website. It turned out that a past family member was one of Leiden University’s first sinologists.

Rain or shine: in the course ‘The Ecology Project’ students of Leiden University College visit the nature of The Hague each week.

If a forged Vermeer or Rembrandt is discovered, it is world news. Yet tracing fakes has long been a low priority in art history. University lecturer Anna Tummers will receive an ERC grant of almost two million euros to change that.

To what extent did the Netherlands grow rich from the Transatlantic slave trade? In his dissertation 'Walcherse Ketens', Gerhard de Kok looks at Vlissingen and Middelburg, the most important slave trade cities in the Netherlands during the second half of the 18th century. It turns out that, although…