By far the majority of users of child sexual abuse networks (or child porn forums as they are sometimes called) on the dark web do not actively communicate there but download illegal material, therefore committing a criminal offence. But they often stay under the police and judiciary’s radar. PhD candidate…

Fifteen hundred years ago, the north-west of what we now call China was a jumble of peoples. How did those Indians, Khotanese and Tocharians influence each other and each other's languages? Associate professor Michaël Peyrot has been awarded an ERC grant of almost two million euros to unravel this 'web…

Eye contact between parents and children improves their mood and increases feelings of connectedness on both sides; but not in the case of depressed adolescents, Mirjam Wever discovered. Where the parent-child bond has been disrupted, it can be strengthened not only with therapy for the child but also…

With the new Euclid satellite, scientists are going to map a large part of the sky. The satellite ofthe European Space Agency (ESA) will soon give them a better view of the galaxies and matter in the universe. Professor of Galactic Astronomy Koen Kuijken and a team of Dutch scientists are receiving…

Art historian Elizabeth den Hartog has been studying medieval sculpture at Leiden University for 32 years. Like a detective, she searches buildings, books and archives in the hunt for the cultural meaning of unique sculptures.

Leiden University has secured an impressive 12 European exchange grants. This is good news for students, lecturers and researchers from home and abroad.

Senior lecturer Rick Honings has been appointed Scaliger professor with effect from 1 July 2020. In the coming years his focus will be on promoting teaching and research on the Special Collections of the Leiden University Library. Honings succeeds book historian Erik Kwakkel, who held this chair until…

After a successful career as a singer, Esmee Schoones started studying French a few years ago. It resulted in a national award for her thesis on musical arrangements of Verlaine's poems and a job teaching French.

Researchers at LUMC have made a breakthrough in understanding PALB2 mutations, an important cause of hereditary breast cancer.

PhD candidate Layla van Wieringen examined how extremist beliefs are passed on within households. In her dissertation ‘Rotten Trees, Bad Apples? Understanding the Intergenerational Transmission of Extremism’, she reveals a reality that media and politics rarely address.

Although smartphones and other consumer cameras are increasingly used for scientific applications like citizen science, it’s still difficult to compare and combine data from different devices. PhD student Olivier Burggraaff developed a new easy-to-use standardised method which makes it possible for…

On the 19th of May 2020, our dear colleague and friend Professor Dr. Huib Ovaa has passed away from prostate cancer. Last summer Huib became ill, and in first instance it appeared that he had attracted a relatively harmless infectious disease. Unfortunately, it became soon apparent that he suffered…

Hermelijn Smits is Professor of Host-commensal Interactions and Immune Modulation. In this role she is increasing our current understanding of the way in which microbes and parasites shape our immune system to protect us from respiratory infections and chronic inflammatory diseases. In her inaugural…

According to some stories, Einstein washed his hands there only once. According to others, students moved it as a joke. Whatever the case may be, Einstein's sink has enjoyed mythical status among students and employees of the Faculty of Science for decades. But what is the real story? Alumnus Alex Pietrow…

Debates about the ‘end’ of the Roman era, how, when, and even if it ended, are still very much alive and raging. However, what happened after the (long) late antique period is a lesser-known and lesser-studied subject. The post-Roman past needs, however, as much energetic investigation and discussion.…

Prison and student life are worlds apart. But in the Learning Behind Bars project, Leiden criminology students get the chance to study inside prison walls with people incarcerated there.

On 26 January 2023, a conference was held at Leiden Law School on children’s rights and migration. The conference, organised by Stichting Migratierecht Nederland (SMN) and the Europa Institute of Leiden University, was attended by academics, lawyers, judges, policymakers, and other legal professionals…

People can be easily mislead with graphs. But they don’t necessarily stay misled, the research shows.

Marieke Adriaanse is Professor of Behavioural Interventions in Population Health and researches behavioural science issues in health. She advocates for better interdisciplinary collaboration and a new form of recognition and rewards within academia. ‘We have to stop being so blinkered,’ she says in…

The enlargement of the EU to include ten East and Central European countries went smoothly. But further expansion is meeting resistance and Poland and Hungary are now abandoning a number of democratic principles. What are the reasons? Antoaneta Dimitrova, Professor of Comparative Governance, explains…

On 21 and 22 March 2019 the workshop 'Criptic Identities. Historicizing the identity formation of persons with disabilities across the globe' takes place at the Leiden Institute for History.

Meet Thomas King, alumnus BA International Studies: ‘I’m currently living in London which is a really amazing experience! I’m a British citizen and I moved to the Netherlands to study BA International Studies back in 2017. I had the best three years ever living in The Hague and studying at Leiden.’

Facebook is under attack due to the scandal with Cambridge Analytica: Data of tens of millions of users have been leaked. Does this mean the end of Facebook? ‘The storm will pass,’ says security expert Erik van der Kouwe. He provides tips on how to keep Facebook from following your every move.

This is a good time for it to happen, in the opinion of Professor of Fatherlands History, Henk te Velde. The abdication of Queen Beatrix is a good starting point for celebrating 200 years of the Dutch monarchy, in 2013. Te Velde is a member of the National Committee for 200 Years of Monarchy: 'By standing…

On a sunny Saturday afternoon in May, twenty-five bright international students gathered in the Old Observatory to celebrate their graduation of the International Leiden Leadership Programme. A tour of the Sterrewacht and the ‘borrel’ made for a nice completion of the Honours programme.

This February, Leiden University honors two scholars who have responded to the challenges of modern society in important, innovative and exemplary ways. Catherine Malabou and Safiya Umoja Noble will receive honorary doctorates for their ground breaking research in philosophy and internet/media studies…

Timothy Metz studied Law and Tax Law in Leiden. Now he’s part of Andri AI, working on the application of artificial intelligence (AI) in the legal sector.

In the Digital Humanities Lab, students and staff can make use of various technical facilities. PhD student Caeso tells us more about his experiences with the printer in the Maker Space.

Can we truly connect with each other through video calls? Yes, according to a recent study. Psychologists found our bodies synchronise almost as much in digital conversations as in real life. But this doesn’t mean we should skip in-person meetings altogether, says researcher Fabiola Diana.

Kirsten Kanneworff and David Dechant defend their PhD research on quantum physics at Leiden University. Fundamental work with applications in location verification and the financial world.

Parents often see that when their sweet, socially-minded children become adolescents they change into selfish 'hotel guests' who think only of themselves. But adolescents become increasingly better at weighing up one another's interests. This discovery has been made by development psychologist Rosa…

'What nature made isn’t necessarily an optimized medicine to use in the human body,’ says Professor of Biological Chemistry Nathaniel Martin. That’s why a group of Leiden researchers is making a chemistry-based improved version of the frequently used antibiotic vancomycin. They received an NWO NACTAR…

Learning to cycle without a handbrake, saying sorry if you're late for a lecture and fathoming out the weird sounds of Dutch. Leiden's new international students get a crash course in Dutch culture during their introduction week.

What do you do when you never got the chance to sign your name in the Sweat Room after graduation? Alumni Brantly Hancock and Kent Moore from the U.S. emailed the alumni officer with a request and came back to Leiden two years after graduation, to finally sign: “It’s a good feeling!”

David Versluis successfully simulated an infant gut virtually. This is crucial for research on improvements in formula milk. Currently, such research primarily relies on diaper contents, which is not optimal. Versluis defended his doctoral thesis on April 23.

With the passing of Henk Jan de Jonge on 16 April 2022, Leiden University has lost one of its most characteristic, learned and devoted professors.

The Foundation for Austrian Studies and the Institute for History are very glad to announce that Monika Baár has been appointed as the holder of the Special Chair for Central European Studies.

At the beginning of the corona pandemic, our Faculty appointed student mentors to guide first-year and international students. What drives these mentors, and what is it like to be back at the Faculty again? Mireia and Marten tell us all about it.

The Repository from the Drug Disease Model Resources (DDMoRe) consortium provides a home to a collection of computational models of disease and drug action that have been used in pharmaceutical and/or academic research. This publically available open-access resource will make it easier for researchers…

Imagine: you are at the end of your fieldwork in Peru and ready to go home when all flights get canceled because of Covid-19. It happened to master student Visual Ethnography Mark Lindenberg. By now, four months later than scheduled, he is back in the Netherlands. How does he look back? And what was…

How do surgeons avoid causing nerve damage or leaving cancerous cells behind? An interdisciplinary research group at the LUMC hopes to improve operations and make them less invasive with the aid imaging techniques. They are working with medical companies to make these techniques widely available.

Search engines are getting better at answering our questions. And chatbots are increasingly likely to search the internet for relevant sources. ‘Search engines and chatbots will become more closely entwined’, says Professor Suzan Verberne.

What do you do when you get the chance to meet Nobel Prize winners in your field? You say ‘yes’, of course! Two young chemists from Leiden had the opportunity to attend the Nobel Laureate Meeting in Lindau, Germany. They share what the experience was like.

How tolerant is the Netherlands on the work floor? Jojanneke van der Toorn, Professor of the Workplace Pride Chair, the first in the world dealing exclusively with LGBT inclusion in the workplace, answers questions on the International Day against Racism and Discrimination.

How can Ronald Mulder run his skates across an ice layer at 60 km/h? His skating blades get help from a lubricating layer of meltwater. In Leiden, physicists found this explanation to be incomplete. Theoretician Hans van Leeuwen and experimental physicist Tjerk Oosterkamp searched for a deeper answe…

The Netherlands Institute in Morocco, part of Leiden University, is open for students from all academic and applied sciences universities in the Netherlands. Four students talk about the added value of studying in Rabat. 'I was surprised that Rabat is so modern.’

On March 28, 2023, our esteemed colleague Prof. Harry Wijshoff passed away. He died after a struggle of several months against a serious illness.

The stadtholder’s court in the Republic of the Seven United Netherlands has long been underestimated. Real courts and the associated court culture were to be found elsewhere in Europe. PhD candidate Quinten Somsen is trying to reverse this image. ‘The stadtholder’s court was actually very lively.’

For his dissertation, Joost Akkermans searched for areas of improvement for delicate fetal laser surgery with Twin Transfusion Syndrome (TTS). This syndrome occurs in the Netherlands 60 to 70 times a year among single-egg twins sharing one placenta. Treatment is possible, but not without risk. Inaugural…

Every month a member of the Institute for History tells about a book that inspired him or her. Afterwards, the pen is passed on to another colleague. This month dr. Robert Stein tells about the book 'La Vérité sur l'affaire Harry Quebert' by Swiss writer Joel Dicker. It is not so much the whodunit that…