How do you progress from an immense gas cloud somewhere in the universe to a star with planets? Research by Astronomy PhD student Martijn van Gelder sheds more light on the earliest phases of this process. He will receive his doctorate on November 24th.

‘Wadden Sea Sounds’ is the name of a new project launched by the Waddenvereniging in collaboration with researchers from Leiden University and the University of Groningen. The aim is to find out how underwater noise affects marine life in the Wadden Sea.

How much mortgage interest can I claim back according to law? Or maintenance payments, how much do the tax authorities let me deduct? Many citizens struggle with questions about the application of tax legislation. Roberto van den Heuvel investigated in what way tax legislation should provide clarity…

De crèche en het klaslokaal zijn misschien wel de meest gunstige plekken voor ziekteverwekkers. Toch is er relatief weinig bekend over hoe kinderen reageren op virussen en bacteriën en hoe het komt dat sommige kinderen veel beter beschermd zijn dan anderen. Simon Jochems, onderzoeker aan het Leids Universitair…

Even though the COVID-crisis continuously evolves and is marked by new realities and uncertainties, we can carefully begin to take stock looking back on the first phases of Dutch crisis management. What can we learn reflecting on the crisis strategies of this extraordinary and transboundary crisis that…

Leiden University’s Campus the Hague is soon to expand into the Central Innovation District in the centre of The Hague. Plans are under way for a Campus boulevard with a new University building in the area between the Prins Bernhardviaduct and Schedeldoekshaven.

Police investigations use wiretapped phone recordings as investigative material fairly regularly. But how do they know that the voice on the recording actually belongs to the suspect? PhD student Laura Smorenburg is trying to answer that question.

In 2022, Leiden will be the European City of Science. University lecturer Jaap de Jong has created special assignments for the journalism master's students to celebrate this: they will go into the city to visualise knowledge from the city.

CML Researcher Merlijn van Weerd wins Parker / Gentry Award 2015 for Conservation Biology at Field Museum Chicago in recognition of his commitment to biodiversity conservation in the Philippines

From recurrent oil disasters to the outbreak of contagious diseases or major fires. Public organisations often learn too little from such crises, according to public administration specialist Wout Broekema. Staff frequently fail to communicate information adequately, which means that lessons are often…

The European Research Council has awarded an Advanced Grant to Prof. dr. Maarten E.R.G.N. Jansen for the research project

TRI Leiden has been strongly involved, together with Nottingham Law School, in the development of the EU Cross-Border Insolvency Court-to-Court Cooperation Principles (‘EU JudgeCo Principles’). They were finalised in February 2015 and recently a book has been published. During a business rescue conference…

Expert in Classics Renske Janssen has been awarded a Rubicon grant. She will use the grant to conduct research at the University of Edinburgh into how Roman law was perceived by society at the time.

Joachim Koops has been appointed as scientific director of the Institute of Security and Global Affairs (ISGA) of Leiden University in The Hague. ‘ISGA is in the position to connect research to policy in the field of security and global affairs, a remarkable combination for this young and creative institute.…

Leiden researchers have found minute movements in the laccase enzyme. This discovery could lead to the development of much more efficient biofuel cells. Publication in Biophysical Journal.

On Thursday the 29th of October, Kennis Maken Den Haag organises the third edition of Den Haag Draait Door. In this online talk show, experts and policymakers will discuss problems that exist in the city of The Hague. During this edition, as usual, students, researchers and residents from the region…

Leiden researchers have compiled information collected by scientists over the past 120 years into a database of plant-fungal interactions. This important biological data is now freely available for researchers and nature conservationists. Publication in New Phytologist.

In some parts of the Roman Empire public meals were the norm: the wealthy treated the whole city to a meal. This phenomenon that suddenly arose and disappeared just as quickly had to do with political and social developments, according to historian Shanshan Wen. PhD defence 6 September.

Every year, Humanities students can nominate their favourite lecturer for the Humanities Education Award. Traditionally, the winner of the award will be announced at the start of the academic year. Who are 2017’s nominees and what inspires them to teach?

Researchers at Leiden University Medical Center (LUMC) and Radboud university medical center have been given the green light to deliberately infect volunteers with malaria in order to test a highly promising vaccine on them.

The Leiden University Fund (LUF)/ Gratama-Foundation has awarded a 35.000 euro grant to statistics researcher Sanne Willems. This grant enables her to examine how uncertainty regarding predictions can be best visualized for the public.

On 5 May we celebrate freedom, a basic human right that should not be taken for granted. We asked international students and staff what it means to them.

This academic year, we are welcoming several international students who have started studying at FGGA with a prestigious scholarship. We asked them about their background, their reasons for applying, and the application process. Congratulations to all students who have been awarded a scholarship!

With his knowledge of medicine and his decisive action, Leiden professor Sebald Justinus Brugmans saved the lives of many wounded soldiers after the Battle of Waterloo, on 18 June 2015 exactly 200 years ago.

Grondstoffen werden vroeger over duizenden kilometers afstand vervoerd. Waarvoor werden ze geruild en waarom sloten mensen in West-Azië zich aan bij deze handelsnetwerken?

On November 22 in Arusha, Tanzania, the Council of Ministers of the East African Community (EASC) endorsed the Democratic Republic of Congo (DRC) as its seventh Partner State.

An endoscopic camera was used to record images of reused medieval fragments on the inside of book bindings from the 16th and 17th centuries. The unique images were made as part of the project ‘FragmEndoscopy: An Innovative Way to Discover Hidden Heritage inside Early Modern Book Bindings’, funded by…

Dark matter. Something invisible that, according to calculations, comprises about 85% of the matter in the universe. With an ERC Advanced Grant of €2.5 million, Professor of Observational Cosmology Henk Hoekstra will map out even more precisely where this dark matter is to be found.

For justice to be done after a crime, most people feel that retribution alone is not enough. These are the results of research by Leiden University and the University of Mannheim (Germany). Publication in Plos One.

Leiden chemists Marc Koper and Ian McCrum have discovered that the degree to which a metal binds to the oxygen atom of water is decisive for how well the chemical conversion of water to molecular hydrogen takes place. This insight helps to develop better catalysts for the production of sustainable hydrogen,…

Political scientist Simon Chauchard (Leiden University) has been awarded a Consolidator Grant by the European Research Council (ERC). This brings him recognition as ‘researcher with a promising track record’ and enables him to set up a research group in the coming five years. Chauchard et al. will analyse…

Yliana Rodríguez was in the middle of a second fieldtrip in the Falklands researching Spanish-English language contact, when global lockdown measures were announced. Sit back, relax and enjoy reading about Yliana's research into a unique speech community.

Philosopher Stefan Buijsman obtained his doctorate this year at the age of 20 at the University of Stockholm, making him the youngest PhD in Sweden. He was already taking lectures in Astronomy in Leiden when he was 12, and at 15 he started a degree programme in Information Technology. 'The first reaction…

In cryptography, the sky is the limit according to the new professor Mathematical Cryptology Léo Ducas. He already designed several cryptosystems as part of his research at the Centrum Wiskunde & Informatica (CWI), some of which might soon be adopted as new international standards. Since December,…

Jojanneke van der Toorn is kicking off the new Academia@WorkplacePride year with the LGBTIQ+ Workplace Inclusion Symposium. As a social psychologist, she wants to share knowledge and gather experiences relating to diversity and inclusion at work

It was for the second time that the theme Business Rescue was discussed at the Annual Conference of the European Law Institute (ELI). It was for the second time that the theme Business Rescue was discussed at the Annual Conference of the ELI. In September 2014 as one of the reportes I presented a progress…

Mindfulness is all the rage. But what is mindfulness and is this popular form of medication completely harmless? Come to the workshop on 19 September by Chris Goto-Jones, Professor of Philosophy and mindfulness therapist, and find out for yourself.

Smallholder farms in tropical regions can double their crop production by 2030 compared to 2015, a study finds to which José Mogollón (Institute of Environmental Sciences) contributed. But to achieve this, the farmers must increase the input of phosphorus beyond what is currently foreseen. The study…

Every year a photographer portrays Leiden as Stadsfotograaf (City Photographer) of the Leidsch Dagblad. This year it is the honor to Leonie van der Helm, an alumna of cultural anthropology. Over the next 52 weeks, Van der Helm will visualize the meaning of 'home'.

Jelle van Buuren bespreekt de link tussen radicalisering en psychiatrische problematiek.

On 24 September the Institute of Environmental Sciences (CML) in Leiden will launch the new version of the Pesticides Atlas in cooperation with Rijkswaterstaat and Royal HaskoningDHV. The online tool is now faster, more user-friendly, more accessible and all data can be downloaded directly. Users can…

Many organisations have a biased workforce, even though diversity has so many advantages. Australian and Dutch researchers, including Leiden psychologist Romy van der Lee, have developed a solution based on a mathematical model. They published their findings in PLoS One on 28 July.

An international team of researchers led by Alice Booth (Leiden University, the Netherlands) have discovered methanol in the warm part of a planet-forming disk. The methanol cannot have been produced there and must have originated in the cold gas clouds from which the star and the disk formed. Thus,…

Leiden University and Leiden University Medical Center have joined the Netherlands Centre for One Health (NCOH), further strengthening the academic network in which such problems as antimicrobial resistance are studied.

On Tuesday 12 January 2021, the Leiden Law School thesis prizes were awarded at the New Year’s event.

Marine Le Pen, an immensely popular French politician, has been found guilty of misappropriating EU funds and is barred from running for public office for five years. Wim Voermans, Professor of Constitutional Law, commented on her conviction in ‘Bar Laat’.

The Academy for Professionals project started in November. The project will focus on further developing existing and new educational programmes for professionals. ‘This is part of taking valorisation seriously.’

As of 1 March 2018, Elizabeth (Liesbeth) de Lange has been appointed as Professor of Predictive pharmacology at the Leiden Academic Centre for Drug Research (LACDR). She is head of the research group Predictive Pharmacology and mainly aims at developing mathematical models that can predict the effect…

On January 11, 2025, our esteemed colleague and emeritus professor Arne van der Gen passed away. Arne was a professor of Organic Chemistry from 1980 until his retirement in 2000, and was a great advocate of the integration and harmonization of European education in chemistry. Arne was 90 years old.

Over the past months regular updates have been provided on the work of the Leiden Turnaround, Rescue & Insolvency team (TRI Leiden) in creating EU Cross-Border Insolvency Court-to-Court Cooperation Principles. During the last week of January this project was finalised, resulting in 26 EU Cross-Border…