The earth has more than 7 billion inhabitants, all of whom leave behind traces of pollution. However, not all forms of pollution have the same harmful effect. Leiden scientists help determine where we should put our priorities.

This project investigates which metaphors are problematic in machine translation, when, why, and for whom.

How many of our laws in the Netherlands are actually determined by the European Union? In many areas, the influence of the EU has increased. But 80 per cent – a figure referred to in 1989 by then European Commission President Jacques Delors – is a very wide estimate. Research from around 15 years ago…

Hugo de Jonge, currently Minister of Housing, has chosen to appear before the Dutch House of Representatives to talk about his time as ‘Covid Minister’. This sets a dangerous precedent according to Wim Voermans, Professor of Constitutional Law at Leiden University. However, under Dutch constitutional…

Na de 7 oktober demonstraties schoffeerde Wilders burgemeester Halsema, door op X te roepen dat zij het land moet verlaten. Volgens experts overtreedt Wilders hiermee de gemaakte afspraken met de coalitiepartijen. Wim Voermans, hoogleraar Staatsrecht, hierover aan het woord in het Parool.

Ten years after its introduction, the controversial idea of Erik Verlinde on gravity is still a hotly debated topic, and is still surrounded by a cloud of scepticism. Scepticism in which the media have played a major role, theoretical physicst Koenraad Schalm says in an article by NWO. ‘The media simply…

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.

For 25 years now, each faculty has had an assessor, a student representing the interests of all the faculty’s students. Yet few students are aware of this.

Alternative demonstrations were held in Leiden and The Hague on Thursday 14 November after the national protest in Utrecht was cancelled. Leiden University supports these protests, which were organised by WOinActie. Read our live blog of the demonstrations.

Masterclasses, network meetings and coaching cafés: the Alumni Office was offering a whole range of activities every month for the University’s alumni. Until coronavirus broke out, that is. The Leiden Alumni Webinars mean that alumni can still meet and share their knowledge with interesting speakers.…

In Dutch newspaper NRC, Pieter Omtzigt says he finds it 'unconstitutional' that he has no right to vote in committee meetings. Omtzigt believes he is as much a Member of Parliament as other MPs. However, since 2017, a breakaway group is no longer entitled to a proportional share of staff support and…

An indian stepwell on a nanoscale. That is what postdoc Nakkiran Arulmozhi calls the pattern he saw when he corroded a special kind of platinum crystal. The unique images show the destructiveness of the process, but also show how predictable it is.

Building the neutrino detector KM3NeT on the Mediterranean Sea floor has picked up pace. Five detection lines, each carrying eighteen detectors, have been sunk and installed, and the first measurement data are coming in, says neutrino physicist Dorothea Samtleben.

Light reflects from a mirror, but where exactly does this reflection happen? Well, it depends, Martin van Exter and Corné Koks discovered. Their precise calculations, published in Optics Express, are important for designing optical cavities for quantum communication.

Soil ecologist Emilia Hannula has been awarded a Vidi grant by NWO to examine how soil could become a promising ally in combating climate change and improving biodiversity. ‘Soil creatures might be invisible’, she says, ‘but they play a huge role in creating a healthy environment.’

Leiden University Medical Center (LUMC) and the Centre for Human Drug Research (CHDR) are taking part in the phase 2 clinical trial of Janssen Vaccines’ candidate coronavirus vaccine. The vaccine will be tested on 45 test participants in Leiden from 14 September onwards.

Veel arbeidsongeschikten kregen jarenlang te veel of juist te weinig uitkering, omdat er fouten zijn gemaakt bij de berekening van het loon waarop de uitkering is gebaseerd. Barend Barentsen, hoogleraar Sociaal Recht, zegt op BNR radio, dat hij niet helemaal begrijpt hoe het zo fout heeft kunnen gaan…

After Zelensky and Putin, President Biden has also used the word ‘genocide’. We should not use the term genocide too loosely, says Professor of Public International Law Larissa van den Herik.

Een dag na de inauguratie van Donald Trump als nieuwe president van de Verenigde Staten werden zoektermen gelieerd aan Biden, Harris en Obama op Instagram aangemerkt als ‘gevoelige content’. Promovendus Danny Mekic waarschuwt in de Volkskrant voor techbedrijven: ‘Extreem onwenselijk’.

Deskundigen pleiten voor automatisch uitkeren van toeslagen en af te zien van terugvordering van te veel betaalde toeslagen. Fatma Capkurt, universitair docent Staats- en bestuursrecht en lid van de Staatscommissie rechsstaat, zegt tegen de NOS dat ‘uit wetenschappelijk onderzoek blijkt dat de overheid…

Every person on earth can read another person’s mind. Not in the way psychics or witches do, but by putting themselves in the shoes of others and considering how they perceive the world. This kind of empathy greatly facilitates communication and interaction. Max van Duijn studies this phenomenon to…

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…

While tens of thousands of visitors dance to deafening music, a team of Leiden psychologists are trying to collect data for their research at Lowlands. How do festivalgoers experience a virtual trip? And what role do factors such as too little sleep and whether they have experience with psychedelics…

A pill can make you better, but how exactly does it work? Primary school children from The Hague found out during a visit to the Centre for Human Drug Research (CHDR) as part of a new teaching module ‘The journey of a pill’.

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…

Using enslaved people as servants, becoming an administrator in the Dutch West India Company or making uniforms for the colonial army. Many people from Leiden played a role in colonialism and slavery. Historians are conducting preliminary research and finding striking examples.

The image of the Leiden microboat traveled all over the world, from the BBC up to Arab shipping blogs. But Daniela Kraft's research group has quite a few more different 3D printed microswimmers up their sleeves. Kraft receives a Vidi research grant for research into these variously shaped active par…

Now that the government has collapsed, the Netherlands will have to vote once more. The elections will not take place before November, says the Electoral Council. The Electoral Act sets deadlines for various steps to be taken before new elections can take place. The fact that the summer recess and autumn…

Ukraine has filed an innovative claim against Russia at the International Court of Justice (ICJ). Ukraine asked the court to rule that it has not committed genocide and that a war initiated based on a false genocide claim was unlawful. Larissa van den Herik, Professor of Public International Law, discussed…

Gedupeerden krijgen maar met mondjesmaat duidelijkheid over hun schadevergoeding in de toeslagenaffaire. Ymre Schuurmans, hoogleraar staats- en bestuursrecht, stelt dat het vooral misgaat door de complexiteit en onduidelijkheid over wie recht heeft op welke compensatie, zegt zij in de uitzending van…

‘I already gave a talk about planets when I was five.’ With the theme of the 3 October celebrations being ‘Jong geleerd is oud gedaan’ (meaning something like, ‘You’re never too young to learn’), this year’s 3 October University was especially for children. Many parents came with their offspring to…

How do cells repair their damaged DNA—and what happens when that process is hindered and cancer arises? Sarah Moser has taken a closer look during her PhD, uncovering surprising insights that could help improve future cancer treatments.

Can bars, gyms and travel providers refuse customers who have no proof of vaccination? And can an employer dismiss employees who are not vaccinated? Reports in the Dutch media about travel organisations and a dance instructor who are refusing customers who have not yet been fully vaccinated have sparked…

Ilze Bot wants to reduce the prevalence of cardiovascular diseases. Her research focuses on mast cells, which protect us from infections but can also make us ill.

A piece of corrugated rubber can function as a simple computer, displaying memory and displaying the ability to count to two. Leiden physicists describe the computing rubber in the journal PNAS. ‘Simple materials can process information, and we want to find the principles behind that.’

Following the fall of the fourth Rutte cabinet, Dutch Minister of Justice and Security Dilan Yesilgöz addressed the Dutch media about the ‘influx’ of family reunification applications by asylum permit holders. In her view, it would put enormous pressure on Dutch society and could jeopardise security.…

It's pretty hard to spot a single 5 nanometer particle. Leiden physicists pulled it off by turning a 120 nm gold rod into a detector.

In zijn oratie bepleit Joachim Koops dat de toekomst van Security and Global Affairs ligt in onderzoek, onderwijs en academisch bestuur.

Hoe kan het dat universele mensenrechten wereldwijd niet hetzelfde in de praktijk worden gebracht?

When a bacterium becomes more resistant to one antibiotic, it sometimes becomes more sensitive to another. To better understand this interaction, researchers from the Leiden Institute of Biology (IBL) and the Leiden Academic Center for Drug Research (LACDR) under supervision of Daniel Rozen and Coen…

Majorana particles have been getting bad publicity: a claimed discovery in ultracold nanowires had to be retracted. Now Leiden physicists open up a new door to detecting Majoranas in a different experimental system, the Fu-Kane heterostructure, they announce in Physical Review Letters.

‘Make use of us!’ This is what the collaborating universities of Rotterdam, Delft and Leiden have to say to administrators and policymakers. And the call has not fallen on deaf ears, says Marja van Bijsterveldt, the Mayor of Delft. ‘Now more than ever we can use knowledge to solve societal issues in…

Mysterious protein fibers show up in the brain cells of people suffering from Alzheimer’s' disease and other neurodegenerative disorders. Leiden physicist Louise Jawerth has been awarded a Vidi grant to find out how these fibers form in the first place.

‘We can see further than the end of our noses.’ This is what the presidents of the three Zuid-Holland universities in the LDE Alliance say in ScienceGuide. Leiden University, Delft University of Technology and Erasmus University Rotterdam have been working together within the LDE Alliance for seven…

How do you integrate minorities into a society, and what kind of influence does this have on the collective identity? These questions may seem modern, but they have been relevant for a long time. The new Eurasian Empires research group studies how integration and formation of identity took place in…

How do stars and galaxies form? What is dark matter? To answer these and other questions, we need increasingly large telescopes. And to build these, we need international partnerships. A series on the impact of collaboration.

Astronomer Frans Snik searches for extraterrestrial life. He doesn’t so much look at stars as at the ‘exoplanets’ alongside them.

On 17 June, primary school pupils in Leiden will get the chance to explore science in an interactive and engaging way. The exciting new show ‘Wetenschapswonders’ is the initiative of master’s students Boele Visser and Ilse Hordijk, from the Rino Foundation. ‘I’m happy to help build a bridge between…

In the Gorlaeus Building, there will be a brand new faculty bar for students and staff. From hundreds of entries, a faculty jury chose the name for this bar. The new bar will be called 'The Fusie'. 'This name exudes togetherness and cosiness,' says FWN assessor Nalani Verwoord. 'And it has an additional…