Why does a medicine work well for one person, but cause side effects in another? Research by Laura de Jong shows that it’s not just our DNA that matters – other medicines and illnesses can also affect how our bodies respond.

Across Latin America, stories of violence against women reveal how deeply gender, power en inequality are intertwined. Researcher Martín Hernán Di Marco tells how storytelling, activism and research together challenge the global cycle of violence against women and girls.

'Let's make this a twice-yearly tradition!'– a feeling shared by many after the vibrant Research Day. Engagement started early, with participants connecting informally over good coffee before the formal start of the event on 19 November.

Professor Nira Wickramasinghe will research forgotten lineages with an NWO Open Competition grant, in particular the afterlife of Dutch slavery in the Indian Ocean World.

Young Academy Leiden wants to bring together young academics. After all, it is not that easy in practice to meet peers outside your field. With inspiring and fun Faculty lunches, the organisation strives to connect young researchers. The most recent, hosted at the Faculty of Social and Behaviourial…

To truly help citizens, professionals sometimes need to dare to deviate from the rules. That was the main message during the meeting on ‘rebellious professionals’ in healthcare and well-being, held on 15 October in The Hague.

Playgrounds often fail to accommodate children with autism, according to researchers Carolien Rieffe and colleagues. They have published an essay offering practical advice on how to make all children feel safe and welcome for Autism Week (Dutch) and World Autism Autism Awareness/ Acceptance Day on 2…

On top of the Gorlaeus Building’s bike parking sits a hidden green surprise: Leiden’s largest rooftop garden. Since this academic year, the garden has been open to all students and staff.

Leiden biologists have found a mutation in flour beetles that allows them to speed up their development. The study has been published in Nature Ecology and Evolution.

Seksueel misbruik tussen broers en zussen kan diepe, mentale wonden veroorzaken. Orthopedagoog Sheila van Berkel geeft behandelaars tips voor hoe zij deze wonden kunnen helpen helen.

Do children growing up in a jihadist or right-wing extremist household develop the same extremist views as their parents?

Would you like to take concrete steps toward a sustainable university or do you have a broad interest in sustainability? Over 200 staff members have already joined the Leiden University Sustainability Network. And there is always room for more – even if you’re no expert on sustainability, says project…

Master’s students in Industrial Ecology and Governance of Sustainability have helped answer organisations’ questions about sustainability

In September 2025 Leiden University hosted a greatly successful academic conference "Care and the Jewish Experience" organized by the Leiden Jewish Studies Network. Among our guests and presenters were academics from many universities, many disciplines and at different stages of their academic caree…

From an emergency fund for Ukrainian students to a golf tournament for cancer research at the LUMC: the Leiden University Fund (LUF) crowdfunding platform is full of fantastic projects that enrich the university. If you are looking for funding for your idea or special project, crowdfunding may just…

Through various initiatives, Leiden University is trying to make people aware of the importance of biodiversity: the cultivation of a wide variety of micro-organisms, animals and plant species. This is important because in the Netherlands biodiversity has declined from about 40 percent in 1900 to about…

The energy transition is already a huge challenge for society, but sustainable use of resources is even more complicated. Yet it is at least as urgent. Ester van der Voet has been working on it for decades, for example within the United Nations. Since February, she is a professor at the Centre for Environmental…

How often do you consider the impact of your choices? 10 October is Sustainability Day: a good time to introduce the new bachelor's programme Science for Sustainable Societies.

Mining for natural resources harms the environment. But we desperately need them, for both the development of countries and the transition to a sustainable energy system. Professor of Sustainable Resource Use Ester van der Voet researches how we can reduce the environmental impact of natural resources…

Cancer treatments often have an impact on people’s sexual health, but doctors and nurses do not discuss topics such as sexuality and intimacy with patients as a matter of course. This is what Esmée Krouwel, a physician-researcher at Leiden University Medical Center (LUMC), has discovered. With her research…

At Leiden University many staff members and students value making sustainable and responsible choices in their personal lives. Making these choices in our professional lives may feel a bit more complicated. But is that feeling justified? Archaeologists Gerrit Dusseldorp and Roos van Oosten share their…

With the aid of physics and a minuscule magnet, researchers have discovered a new structure of telomeric DNA. Telomeres are sometimes seen as the key to living longer. They protect genes from damage but get a bit shorter each time a cell divides. If they become too short, the cell dies. The new discovery…

Tjerk Oosterkamp's group is conducting what is perhaps the coldest research in the world. The researchers have cooled a sensor to below 2 millikelvin - almost as cold as absolute zero. This allows them to make extremely sensitive measurements. PhD candidate Jaimy Plugge helped build the setup: ‘We are…

Mini organs-on-chips allow us to study how diseases develop and how drugs work. Although the technology is not new, it is becoming increasingly advanced. PhD candidate Bart Kramer hopes it will eliminate animal testing in the future.

Why is the sky blue? Why are most people right-handed? Why are spiderwebs so strong? These are just some of the questions arriving at Postbus 71, a Leiden2022 project where everyone can ask their questions. Friso de Hartog, the driving force behind Postbus 71, is busy answering as many questions as…

Literature – and films and social media too – helps us understand ourselves and society. That makes literary studies an eternally modern discipline, especially if you dare to combine it with other disciplines, says Nidesh Lawtoo.

In Nieuwsuur ging Michael Klos, docent/onderzoeker bij de Universiteit Leiden, ging bij Nieuwsuur in op ‘de Twitterfiles’.

In the article “Neanderthals and Us: We’re More Alike Than Once Thought”, we are reminded that many negative traits, from unintelligent to unsophisticated, have long been attributed to Neanderthals in popular culture. However, recent studies bring to light an ever-increasing amount of evidence contradicting…

Organisation

The Neumark-Nord 2 site in central Germany, dates back to 125,000 years ago. During an interglacial period with temperatures similar to those today, Neanderthals where doing something we previously thought happened only tens of thousands of years later.

Leiden physicist Anne Meeussen has been nominated for the title of New Scientist Science Talent. She will be up against 14 young scientists from other Dutch and Belgian universities. The polls are already open!

What are you supposed to do if something goes or has gone wrong? Whether it be a break-in, an accident or an unsafe situation of any other kind, or a data breach or a cyber-attack; please read how to report each type of incident below.

Bachelor, Master

If you’re experiencing too much work pressure, talk about it to your colleagues and your manager. This is the only way we can jointly work towards a solution. How do you raise the issue of work pressure? And what can you do to prevent work pressure from getting out of hand?

From medicines from snake venom to supercrops and the origin of words. Thirteen researchers from Leiden University will receive Open Competition XS grants from the Dutch Research Council (NWO).

Never before has so much research been carried out on the therapeutic effect of psychedelic drugs. Researchers at the LIBC Public Day are happy about the effect the drugs can have on depression, anxiety and PTSS, but at the same time they have some doubts. ‘The hype is bound to crash before long.’

Should we cut our ties with Israel or maintain them? The event ‘A university conversation on Israel/Palestine’ on 1 July revealed the depth of feeling about the conflict, with students and staff grappling with academic values and moral dilemmas.

How do we offer students a helping hand without losing sight of our own well-being? This was the question that study advisers, lecturers, deans and student support staff tried to answer at the Staff Symposium on Student Well-being.

On Tuesday 11 January 2022, the new year at the faculty was ushered in with an online event. Dean Joanne van der Leun toasted the new year and of course the annual Meijers prizes and thesis awarded were presented.

The touring exhibition 'Presenting with the city' has touched down in the Lipsius Building. In the presentation, students and researchers show how their research has contributed to the city.

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.

On November 30, 2023, the research group Institutions for Conflict Resolution (COI) organized a stakeholder meeting on governmental problem-solving and its implications for legitimacy. COI is a joint collaboration between the Universities of Leiden, Utrecht, and Nijmegen as part of the Dutch Sector…

A small group of Students for Palestine demonstrators occupied the Academy Building on Rapenburg in the afternoon of Wednesday 26 November. The Cleveringa Lecture by political scientist Hélène Landemore had to be moved to Leiden Law School’s Kamerlingh Onnes Building.

Carola Schoor, programme manager for Public Affairs at the Centre for Professional Learning (CPL), reflects on Politico on the State of the European Union speech by Commission President Ursula von der Leyen from a political strategy and messaging perspective.

Dr. Andrew Littlejohn has been awarded a Hunt Postdoctoral Fellowship by the Wenner-Gren Foundation for Anthropological Research. The fellowship provides funds for early-career scholars to write and publish significant monographs that will impact the development of anthropology.

On November 1, the LACDR Fall Symposium took place. After the symposium was opend by prof.dr. Hubertus Irth, the program started with a lecture called “Poly(2-oxazoline)s, structural chameleons in therapeutic delivery” given by key note speaker dr. Joachim van Guyse.

On February 28 at ROC Amsterdam, in the presence of more than 300 students and teachers, 'De Bovenkamer' was launched; an online teaching package that makes mental health open to discussion in an accessible way at secondary schools and MBOs.

In our building, a new, colorful exhibition is now on display! Twelve artists from the collective "De Leidsche Mondialen" are showcasing their work in various locations within the Faculty of Social Sciences (FSW).