Ammonia has been feeding the world for decades as a fertiliser and is now rapidly emerging as a carbon free fuel for shipping and industry. But if we focus only on CO₂ emissions, we risk creating new nitrogen problems, warns nitrogen expert Jan Willem Erisman in the journal One Earth.

Leiden University and four other Dutch universities will appoint 51 PhD candidates to conduct solution-oriented research for and with the African continent.

The department of Financial and Economic Affairs at FGGA is always busy with…..finances. It is an important department that impacts, directly or indirectly, everyone working at FGGA. Yet, for many of us, it is not always clear what it is that Gert and his team actually do. What is the financial status…

Haar hele leven wilde de geadopteerde Cindy Huijgen terug naar haar geboorteland China. Inmiddels is de alumnus Chinastudies en Journalistiek en Nieuwe Media er correspondent.

Starting as an MP during the Covid-19 pandemic and after the recent ‘role elsewhere’ debacle during the coalition talks for a new Dutch government, alumna Mariëlle is looking forward to making a real contribution in society.

The world is in turmoil. International wars and conflicts have been raging for some time. And political and social developments are causing insecurity, uncertainty and unrest. This has not gone unnoticed within our university community. We have seen protests, demonstrations and other incidents. This…

Like many moot court competitions around the world, the Leiden-Sarin International Air Law Moot Court Competition was conducted fully online this year. The International Air Law Moot Court is an unparalleled forum for bringing together students and aviation professionals who share a passion for air…

Een internationaal consortium onder leiding van Olaf van Vliet heeft een Horizon Europe subsidie van 3,4 miljoen euro gewonnen. In het onderzoek staat centraal hoe wereldwijde sociale veranderingen zoals migratie, digitalisering en de klimaattransitie de arbeidsmarkt beïnvloeden en wat daar de gevolgen…

The LUCAS Institute has both a new Scientific Director and a new Education Director. Stijn Bussels and Esther Op de Beek both commenced their new roles at the start of the academic year.

Starting as an MP during the Covid-19 pandemic and after the recent ‘role elsewhere’ debacle during the coalition talks for a new Dutch government, alumna Mariëlle is looking forward to making a real contribution in society.

Egbert Jongen researches income inequality in the Netherlands. Where are the differences and what can we do about them? This Professor of Economics and Socioeconomic Policy will explain more in his inaugural lecture on 1 July. ‘We can learn from countries with less difference between men and women and…

Are you curious about how the human skeleton works? Discover this and more on 3 October in Leiden and on 4 October in The Hague.

Life cycle assessment (LCA) reveals the total environmental impact of products or production processes, and EU rules are going to make this even more important.

Are we on the right track towards a circular economy in 2050, with fully renewable energy technology and circular construction? The CML of Leiden University, together with the Netherlands Environmental Assessment Agency (PBL), TNO, Utrecht University and RIVM, is investigating what is needed to achieve…

International bachelor’s and master’s students started the OWL on Monday morning. During this introduction week they get to know their new university, city and each other.

Students who also want to develop their artistic talents can take a year-long art class – Practicum Artium – at the Royal Academy of Art in The Hague. ‘I can express my creativity and am learning to approach subjects in a visual way.’

Leiden Law Cast is a podcast made by Leiden Law School, Leiden University, for everyone who wants to learn more about current legal issues.

Tuesday was the opening session of the LDE Bachelor Honours Programme Sustainability. Lecturers introduced themselves, students got to know each other and it was revealed what they will do to contribute to a more sustainable world in the coming months. "I immediately feel like getting started," said…

Han Meyer, Carola Hein, Paul van de Laar and Sabine Luning, argue that in the current moment of major crises these ship channels necessitate radical reconsideration.

Leiden Law Cast is a podcast made by Leiden Law School, Leiden University, for everyone who wants to learn more about current legal issues.

Human cells are protecting their proteins from unfolding and aggregating. That's what biophysicist Alireza Mashaghi and his team discovered after seven years of in-depth research into the folding mechanisms of proteins. With an unprecedented approach, the team was able to study the folding of a single…

On 7 July, the Mayor of Leiden, Peter Heijkoop, visited Leiden Law School. During his visit, he learned about the faculty’s commitment to advancing research and education while contributing to tackling the challenges faced by society.

Taking a Bachelor’s in Security Studies while starting and running two businesses: student Mohamed Sulaiman never stops. But he wouldn’t have it any other way. PLNT The Hague entrepreneurs’ hub is a source of help and inspiration.

What is the relationship between humans and nature like? And how can we use it to tackle climate problems? In the Master Honours Class ‘Planet in Peril’, students approach climate issues from the perspective of the humanities. ‘Things are not always as one-sided as they seem.’

What does the University mean for The Hague? And what are researchers and students learning from the city and its residents? The Hague city councillors visited Campus The Hague on 27 September and spoke to administrators and researchers. ‘From Schilderswijk to Benoordenhout: we are a university for…

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

For a long time, Thijs Bosker was an average student, until he discovered how exciting learning becomes when there are no ready-made answers. To his students, he passes on one key message: hope is the driving force that keeps us moving forward. They nominated him as Lecturer of the Year.

Most people think of waste as something dirty that needs to be disposed of as soon as possible, but Olivia Yun-An Dung's dissertation aims to show that this does not always have to be the case. For this purpose, she focuses on Tzu Chi recycling in Taiwan. There, an army of elderly volunteers has been…

What is the environmental impact of the fish on our plates? And is an electric car really more sustainable when we include the generation of electricity? Jeroen Guinée maps the environmental impact of products and technologies. He analyses them from raw material to waste disposal. He was appointed Professor…

What effect did the lockdown have on young people? Leiden researchers started a study of this in the first year of the covid pandemic. They discovered an impact on the development of the brain areas involved in social behaviour. The researchers published their discovery in Scientific Reports at Nat…

The course Designing Your Life helps students navigate their career pathways. As it turns out, these pathways are full of twists and turns and - as with many journeys - you only make progress once you gather the courage to take the first step.

About forty microscopes, various laboratories, and some 15,000 zebrafish: that’s Sylvia le Dévédec's workplace. She is one of the managers of the Leiden Cell Observatory, a unique facility accessible to all researchers.

In 2025, our colleagues from the Institute of Psychology once again made a strong presence in the media. From (inter)national newspapers to podcasts, discover where they shared their expertise in the media this year.

Debate, Leiden Asia Academy

Study support

Lecture, Studium Generale

Exhibition

450 jaar

Arts and culture

An Iron Age skull, a unicorn for cleaning your ear and thousands of beer jugs. Alumnus and archaeologist Chris Muysson has made remarkable discoveries at the Binnenhof government complex in The Hague. ‘Each puzzle piece tells us more about its history.’

Annetje Ottow is stepping down as President of Leiden University’s Executive Board on 1 September 2025 after almost five years in the role. She looks back at the highs and lows – and ahead to what’s next.

How has evolution shaped our curiosity? And how does that curiosity ensure that we now have the technological ability to discover whether we are alone in the universe? This was all covered during the celebration of Leiden University’s 449th Dies Natalis.

Some bacteria, it turns out, have proteins much like ours that organise the DNA in their cells. They just do it a bit differently. This is revealed by new research from biochemists at the Leiden Institute of Chemistry and the Max Planck Institute for Biology. The discovery helps us better understand…

Leiden Law Cast is a podcast made by Leiden Law School, Leiden University, for everyone who wants to learn more about current legal issues.

Online, hybrid, on campus... It was an unpredictable year, also for the Faculty of Humanities. Luckily, there were also non-corona related stories. Let's review 2021 with this list of the most-read news articles per month.

From towering mechanical heroes to city-destroying battles, giant robots have become one of the most iconic images in Japanese animation. On 28 April 2026, Leiden University will host "Giant Robots, Big Ideas", an afternoon event exploring how these spectacular machines reflect deeper questions about…

Leiden Law Cast is a podcast made by Leiden Law School, Leiden University, for everyone who wants to learn more about current legal issues.

Leiden Law Cast is a podcast made by Leiden Law School, Leiden University, for everyone who wants to learn more about current legal issues.

Leiden Law Cast is a podcast made by Leiden Law School, Leiden University, for everyone who wants to learn more about current legal issues.