On Thursday, May 16, Leiden University Libraries is organizing a workshop on early photography of the Middle East. In the workshop, curator Maartje van den Heuvel shows photos of three adventurous Dutch nineteenth-century travel and photography pioneers. They created beautiful photos and photo albums…

How can we guarantee the safety of the crown witness scheme for both crown witnesses and lawyers? How can we ensure that online conversations between lawyers and their clients remain confidential? And what are the risks of extra secure communication tools?

Leiden PhD candidate Jo-Anne Verschoor discovered that nearly twenty percent of the bacterial strains she studied could degrade plastic, though they needed some encouragement to do so. ‘Bacteria are just like people,’ says Verschoor. Her research was published in the journal Communications Biology,…

On 11 June 2025, the MA in International Relations (MAIR) Programme convened its 2nd Humanities & IR Graduate Conference at The Hague Campus (Schouwburgstraat), welcoming over sixty participants from twenty institutions in Europe, North America, and Asia.

Connecting space to society and gaining problem-solving experience: that’s the goal of LDE Space & Society, a new honours programme for bachelor’s students in Leiden, Delft and Rotterdam. What does the programme look like? And what do students hope to learn? We visited a kick-off session full of exc…

In a world where bacteria are increasingly resistant to antibiotics, Emma van Groesen set out to find a solution. This month she obtained her PhD, after four years of research into new variants of the antibiotic vancomycin. With success.

Throughout the year, master's student Berber Kommerij is busy analysing medieval and early modern books and paintings. Every summer, however, she leaves for the Norwegian fjords to conduct sea kayaking tours. 'Watersports are my great love.'

A bacterium hiding from the immune system and picking up bits of DNA from its environment. The result: gaining new traits, such as better protection against antibiotics. Fortunately, we have not found such a damning scenario yet. However, PhD student Renée Kapteijn did find the first clues, which…

Dr. Salwa El-Awa delivers a talk on Wednesday, November 2nd, on "Ambiguity in the Qur'an".

At the start of the COVID-19 pandemic, researchers from 15 departments at Leiden University Medical Center (LUMC) realised they could do more for patients if they joined forces. This is how the BEAT-COVID group has been able to rapidly gain knowledge about COVID-19, the role of the immune system and…

No less than four Leiden research teams have been awarded a grant by NWO. On 27 July NWO honoured 21 applications in the Open Competition ENW-XL. NWO awards the grants to consortia in the exact and natural sciences who are doing unconnected fundamental research that is 'driven by curiosity'.

On 1 March 2023, the Dutch Safety Board (Onderzoeksraad Voor De Veiligheid, OVV) published its report on the protection provided by the Dutch security services and lessons learned from three cases. The OVV was highly critical of the use of key witnesses and the protection offered to them. Jan Crijns,…

PhD defence

PhD defence

PhD defence

Lecture

PhD defence

PhD defence

PhD defence

In 2022, every euro in the Netherlands lost about 10% of its value, price increases comparable to the stagflation period of the 1970s. In the same year, the value of the Argentine peso halved, while prices in China only rose by 2%. How well do we understand the economic mechanisms behind inflation?…

Arts and culture

The social sciences are vital in navigating complexities, fostering understanding and bridging divides. This was celebrated during the faculty opening of the academic year.

PhD defence

PhD defence

Explosions at people’s homes, gangland killings and online threats: if you follow the news, it may seem as though threat levels in the Netherlands are rising. But is that really true? Researchers from Leiden University investigated this and have presented their results in the Dreigingsmonitor (Threat…

Adults are more likely to reoffend after a short prison sentence than comparable adults with a non-custodial sentence, Leiden University research shows. This is true for the likelihood and extent of repeat crime.

Hunter-gatherers acquire their food through complex gender-specific foraging techniques for a relatively stable and diverse supply of energy. New research indicates that this specialisation by boys and girls starts at a very young age. Most likely, this enabled the human species to evolve much larger…

Researchers, civil servants and local residents met on 27 September to talk about partnering for sustainability. What were the results? In a green ‘city oasis’ in the centre of The Hague they spoke about the energy transition, bottom-up initiatives and citizen science.

A dissertation covered in hot pink faux fur, antique prints of PhD ceremonies, a pot encrusted with sealing wax: the Hora est! anniversary exhibition at Oude UB takes you to the ritual yet idiosyncratic world of PhD ceremonies.

‘What I find most alluring about soil life is that you can steer it,’ researcher Martijn Bezemer of the Institute Biology Leiden (IBL) reveals. ‘You can ask: What do you want? And then I can transform the soil into something you need. At least, that is what we thought.’

The annual Korean Screen Culture Conference (KSCC) is dedicated to exploring all aspects of Korean screen culture, including television, K-pop, internet, computer gaming, webtoons, and film from both North and South Korea.

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.…

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.

eHealth can improve our lifestyle without the involvement of a healthcare provider. Talia Cohen Rodrigues investigated the possibilities for people with cardiovascular diseases. ‘People with a low socioeconomic status may be more difficult to reach with eHealth.’ She will defend her doctoral thesis…

How can groundbreaking research help Europe tackle the huge challenges it faces? At the launch of the Leiden Europe Hub, academics and policymakers discussed this in the heart of European democracy: the European Parliament.

From 1 October onwards, Dennis Claessen and Marcel Schaaf will be the new directors of education of Biology. They will replace Han de Winde. Schaaf will be responsible for the bachelor, while Claessen will mainly focus on the master tracks of Biology. We gave students and the education office the change…

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…

After an extremely painful conclusion, the Western allies have left Afghanistan and the Taliban have regained supremacy. How will Afghanistan move forward, and what does the departure mean for global relations? Rob de Wijk, emeritus Professor of International Relations and Security, analyses the failure…

Raised by his grandmother and grandfather, trained as a doctor, the medical director of a camp for Eritrean refugees: Ephrem Tesfay was anything but a typical student when he arrived in Leiden in 2019. Still, he fit in well with the ‘youngsters’.

How do you know if your idea has succeeded? The Queen coming to call a year and a half later might just be a clue. This happened to the Leiden student foundation ‘Door Het Geluid’, which promotes student well-being.

Autistic people have problems communicating their borders towards the non-autistic community and often do not feel respected. To not only change daily life for autistic people, but also the scientific community from within Carolien Rieffe (Developmental Psychology) addresses this issue in her research…

An international team of astronomers led by Dutch scientist Martijn Oei has discovered the largest pair of jets from a black hole ever seen. The 'jumbojets' extend a combined length of 140 Milky Ways. The Leiden Observatory played a prominent role in this research. The publication will feature on the…

On Tuesday 10 January, the Meijers Lecture was held followed by the New Year’s reception in the restaurant of the Kamerlingh Onnes Gebouw. Dean Joanne van der Leun opened the reception with a New Year’s speech. The following is a short overview of the event.

In the MS Cognitietour, psychologists and neuroscientists from Leiden University discuss the latest scientific knowledge with MS patients and their loved ones. This leads to insights: 'One lady told how much stress she felt from all those caregivers around her bed.'

On 7 and 8 November 2024, the International Centre for Counter-Terrorism (ICCT), the Institute of Security & Global Affairs at Leiden University, and The Netherlands’ National Coordinator for Security and Counter Terrorism (NCTV) partnered to host a ‘Blue-Sky’ Terrorist Exploitation of Artificial…

Not all students spend the holidays with family and friends. The Leiden University Winter Weeks gives these students the opportunity to take part in a range of fun and free activities. The student well-being team worked again with student organisations from Leiden and The Hague to organise this year’s…