Leiden University and Stadslab Leiden invite you to improve the Leiden and The Hague environment with 450 extra trees – a living reminder of 450 years since the Relief of Leiden and the foundation of Leiden University.

As a researcher, it can be fun and useful to talk to the media about your work. But on what terms should you agree to do an interview or appear on a talk show? And how do you tell an engaging story? The Media Guide for Researchers is here to help. Three colleagues share their top tips.

What if I completely changed everything? A subject without lectures or exams, where the right answer is not important and where students work with their hands. With this idea, Michiel Brentjens reformed the course Radioastronomy. His students are so enthusiastic about this approach that they nominated…

Whether finding signals of dark matter or discovering hydrogen in the vicinity of exoplanets, Leiden astronomers are world players in their field, and they are part of a long tradition: Leiden was the first university in the world to have its own observatory.

Political games have existed throughout history, but what is the role of 'play' in the way the American political world has developed? University lecturer Sara Polak has received an ERC Starting Grant to investigate this.

Scientists have detected a neutrino with the highest energy ever measured. Leiden physicists Maarten de Jong and Dorothea Samtleben were involved in this project, which was widely covered in newspapers and online media last week.

It’s starting to become a real Dies Natalis tradition: on 8 February professors from Leiden University teach a class at primary schools in the region. This introduces children to academia and teaches them more about conducting research. ‘Had you expected me to be a woman?’

Underwater noise from seismic surveys affects the behaviour of Atlantic cod. These are the results of research by Leiden biologists in collaboration with colleagues from Belgium. During such surveys the fish are less active than usual and their circadian rhythm is disrupted; soon after exposure they…

Marie Robin, Assistant Professor at the Institute of Security and Global Affairs, discusses in Le 1 Hebdo, Radio France and RFI how revenge, often condemned as destructive, can also reveal what societies consider just and shape pathways toward peace.

On this page we've bundled the best practices which will be presented during the Education Market of 19 June 2025.

Last Friday, more than a dozen people died during the storming of Spain’s North African enclave of Melilla. A dramatic incident, but certainly not the first time that refugees and migrants have used force to try to enter Melilla.

The coronavirus crisis had a major impact on the judicial system in the Netherlands: courts closed at the start of the pandemic and instead held virtual hearings. Research now shows that things did not always go smoothly.

The International Court of Justice has issued an interim ruling calling on Israel to take immediate action to prevent genocide. South Africa had accused Israel of violating its obligations under the Genocide Convention, which both countries are a party to. Professor of Public International Law Larissa…

Got an hour to spare over the long weekend? Then listen to an episode of the new podcasts that have seen the light of day at the faculty in recent months.

Dutch Central Bank President Klaas Knot wants to wind down the European Central Bank’s crisis bond-buying programme this year because the economic outlook is looking increasingly positive.

Last week, Kaya Peerdeman received the SIPS Early Career Award at the fourth international conference of the Society for Interdisciplinary Placebo Studies in Duisburg, Germany.

In Belgium Radio 1, Marieke Liem (professor of Violence and Interventions) gives a scientific perspective on serial killers and explains the typical Hollywood image of serial killers is not in line with reality.

At a recent meeting, the leaders of the European Union formally approved Ukraine and Moldova’s candidate status to join the bloc. The message is: you are welcome to join our European family in due course.

When it comes to wealth distribution in the Netherlands, you often hear that there is a huge gap. Is that true? And is this gap also widening, as is often claimed?

How can you ensure that your research hits the headlines? How can you bring your research output, such as PhD research or a publication, to the attention of the public?

Exploring the largest structures in the universe by looking at the tiniest particles? Lydia Stofanova, PhD candidate at Leiden Observatory and SRON Netherlands Institute for Space Research, dives into this intricate connection. In her PhD research, she explored how elements like oxygen influence the…

‘Space Antenna LISA will open an unprecedented window on the Universe,’ says astronomer Elena Maria Rossi. The mission will be the first one to detect Gravitational Waves from space. These can tell us more about the beginning of our Universe and the formation of black holes. With an NWO grant of twelve…

To what extent does exoplanet Proxima b resemble our Earth? And is there some form of life present? Astronomers hope to find answers to these questions with the new European Extremely Large Telescope (ELT). An NWO research grant of €18 million will allow a Dutch consortium to continue building instruments…

Dutch election signals a return to the political centre, with voters seeking practical solutions both at home and across Europe. Bernard Steunenberg, Professor of Public Administration, cautions that losses for the PVV, the party of Geert Wilders, do not mean the far right has been defeated.

As part of its plans to introduce a stricter asylum policy, the Dutch cabinet wants to expand checks at internal borders within the EU. Professor of Law and Society Maartje van der Woude tells Dutch daily newspaper NRC that this is a symbolic measure: ‘Border checks will not counter the right to seek…

Beautiful prizes, special speeches, and a reception with live music. The well-attended Leiden Science New Year's reception was a delightful way to start the year 2023. Dean Jasper Knoester opened the event after which it was announced who were chosen teacher and bachelor student of the year.

The Dutch Senate recently voted on a ban on imposing community service after physical violence towards public service providers. Courts are no longer allowed to issue these sentences in case of extreme violence and vice crimes. The punishment for these crimes will be an enforced prison sentence. But…

The Royal Netherlands Academy of Arts and Sciences (KNAW) announced on 25 April that it has appointed 18 new members. These include Leiden professors Andrew Webb and Jos Raaijmakers.

Research

Since the publication of the article in the interdisciplinary journal Nature, over 200 news outlets have showcased the pioneering research.

Children are suffering disproportionally from the coronavirus measures. They feel depressed more often compared to other age groups. But what about the legal perspective? Are children’s rights being violated?

During a working visit to a company that cleans up space debris, the British Prince Charles suggested that a climate agreement specifically for space might be a good idea. Experts, including Leiden Law School’s Tanja Masson-Zwaan, say the idea is wishful thinking.

Data from 41 million galaxies does not shake up the standard cosmological model after all. To that conclusion, to their own surprise, comes an international team of researchers including Koen Kuijken, professor at the Leiden Observatory.

Four promising young researchers from Leiden University have received a Rubicon grant from the Dutch Research Council (NWO). This grant will enable them to gain valuable research experience at top universities abroad.

The design for the METIS instrument for the Extremely Large Telescope (ELT) is final. The European Southern Observatory (ESO) has given the green light for production of all parts of the instrument. It is the first ELT instrument, designed and to be built under Dutch leadership, to formally pass the…

Sixteen researchers at Leiden University are to receive a Veni grant from the Netherlands Organisation for Scientific Research (NWO). These awards offer promising young researchers the opportunity to further develop their own ideas over a period of three years.

Study support

A particular group of counter protesters have been sighted at numerous Black Lives Matter protests that were held in the United States. An extreme right movement known for its characteristic Hawaii Shirts and heavy weaponry that calls itself the Boogaloo Boys. Which is cause for concern among the American…

Also in 2024, our colleagues from the Institute of Psychology were visible in the media in various ways. Check out their appearances in Dutch media, from NRC to the Podcast psychologist.

PhD candidate Sebastiaan van de Lubben has written live blogs about Leiden politics. But how do you go about covering an event while it unfolds? ‘You don’t have time to think while you’re at it.’ Much proved to be unknown about this relatively new journalistic genre.

Various thought-provoking questions have been appearing online and in print adverts. They are part of a national university funds campaign in which the Leiden University Fund (LUF) is also participating. We wanted to find out more, so we called LUF Director, Lilian Visscher.

Young researchers met this month for the fifth Science Communication Summer School. ‘This is the first time some participants get to meet other researchers who also enjoy science communication. It’s great to see’, says Julia Cramer, one of the coordinators.

A team led by Leiden University in the Netherlands and the National Radio Astronomy Observatory have, for the first time, robustly detected semi-heavy water ice around a young sunlike star. In this ice, some of the ordinary hydrogen atoms have been replaced by deuterium, a heavier variant of hydroge…

Wouter Veenendaal, a political scientist at Leiden University, is an analyst for the Freedom House report. Freedom House is an American non-profit organisation dedicated to democracy, political freedom and human rights. In short, the report describes the degree of freedom and the state of democracy…

Many protoplanetary discs in which new planets are formed are much smaller than thought. Using the Atacama Large Millimeter/submillimeter Array (ALMA) scientists of the Leiden Observatory looked at 73 protoplanetary discs in the Lupus region.

PhD defence

Lotte van Dillen has every confidence in the Executive Board of new-style Institute Psychology. ‘If we work on the basis of everyone’s good intentions, we’re going to do great.’ If you lack confidence, you’re not the kind of person to jump on your bike and go off to Sicily. Want to find out more about…

Wereldwijd worden veel samenwerkingsverbanden met Rusland stopgezet vanwege de oorlog in Oekraïne. Hoe zit dat met de ruimtevaart, waar de Russen ook een groot aandeel in hebben?

Europe's open borders are under pressure: Europe has an increasing number of Member States with governments calling for tighter border controls. Several political parties in the Netherlands are also calling for stricter border controls, among other things, to reduce the number of asylum seekers. Yet,…

Leiden University is awarding an honorary doctorate to virologist Marc van Ranst. Van Ranst has been one of the main advisers of the Belgian government during the Covid pandemic. German Arabist Beatrice Gründler will also receive an honorary doctorate for her work in the field of Oriental Manuscript…