During the Opening of the Academic Year 2024-2025, we asked guests for their wishes and ideas for Leiden University's anniversary year in 2025.

Hortus prefect Paul Keßler was a part of the delegation of Leiden researchers that traveled to Indonesia on a knowledge mission. In two weeks, he visited seven different universities and institutes and of course he also went to see three botanical gardens.

LUC students and staff came together this past semester to transform a local urban garden into a hands-on space for learning, experimentation, and community building.

Genes predict whether you have a propensity for an illness but environmental factors often have the last word: nutrition, air pollution, lifestyle, stress. The exposome as both culprit and chance. Large-scale research is being carried out into this at Leiden. Thomas Hankemeier, Professor of Analytical…

The Hortus Talks is a podcast series as well as a botanical college tour, recorded in the greenhouse in the middle of the Hortus Amsterdam. The theme of the podcast was plant migration. In this context Anastasia explained the importance of understanding how hunter-gatherers impacted past landscapes…

The carnivore diet, a fact or just a trend?

Joey Zuijdervelt

The environmental risks of new pesticides containing nanoparticles are inadequately researched, according to four Leiden scientists in the scientific journal Environmental Science & Technology. They call for an examination of the long-term and environmental effects of pesticides containing nanoparti…

Imagine we could do what green plants can do: photosynthesis. Then we could satisfy our enormous energy needs with deep-green hydrogen and climate-neutral biodiesel. Scientists have been working on this for decades. Chemist Chengyu Liu will receive his doctorate on 8 June for yet another step that brings…

The biographer of Leiden University, Willem Otterspeer, has a new book out. In ‘De stad, de dood en de dichters’ (The City, Death and the Poets) he combines his love for the University and poetry with autobiographical reflections. ‘With my magnifying glass I discovered yet more new details in the pr…

When assistant professor Jiyan Ilbrink isn't working at the university, she can be found in her vegetable garden. On the plot of land around the corner from her home, she grows the most delicious tomatoes, zucchini, and potatoes.

Give organisms like plants and animals the freedom to move, interact and meet their own needs, and they will thrive on their own, says Professor Geert de Snoo. Our interference often ends up doing more harm than good.

On 22 May, astronaut André Kuipers opened the new Mediterranean garden in the Hortus. With this water-efficient garden, the Hortus aims to offer inspiration for future- and climate-proof garden planting. Prefect Paul Keßler and scientific director of the Leiden Observatory Ignas Snellen also signed…

Whales in the vicinity of the city of Auckland, New Zealand consume large amounts of microplastics every day. A team of international researchers reached this conclusion after carefully examining whale poop. The team included Thijs Bosker, Associate Professor in Environmental Sciences at Leiden University…

In a new study published in PLOS One, Leiden archaeologist Anastasia Nikulina, together with an international team from France, Denmark, the United Kingdom and the Netherlands, challenges the long-held belief that early humans had minimal impact on their environment before the rise of farming.

Microorganisms that temporarily ‘go to sleep’ play an important role in the evolution and survival of a population. Mathematician Shubhamoy Nandan conducted research on the effect of this characteristic called ‘dormancy’ in a novel mathematical model.

Researchers at Leiden University have been awarded a €4 million EU grant to develop climate-neutral fuels. With this money they will expand the broad research community that focuses on green energy. If we work together, we can make the rapid progress that is needed, says Prof. Huub de Groot, Professor…

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…

PhD candidate Ludwig Hoffmann will spend two years at Harvard University in the US thanks to a Rubicon grant he won on April 11. Using theoretical models he studies biological tissues, for example during morphogenesis. This is the process that causes tissue or organisms to develop their shape. ‘This…

The starting point of human-induced landscape changes has been under permanent debate. It is widely accepted that the emergence of agriculture strongly increased human impact on their environments. However, foragers can and do actively transform land cover and ecosystems. Ethnographic observations,…

Una Europa, an alliance of 11 top European universities, provides annual seed funding for new research and teaching projects. Assistant Professor Carmen van den Bergh applied for funding with her Flemish and Italian counterparts. Thanks to this funding and the support of Erasmus+, students can now take…

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…

Researchers at the Faculty of Science work at the frontiers of knowledge every day, tackling today’s major societal challenges. Their work is recognised through grants, prizes and other awards. We highlight some of these achievements.

For the first time, a court has ordered a company to reduce its carbon dioxide emissions. Lawyers see it as a landmark ruling that will have far-reaching consequences for Shell and possibly also other similar companies.

Facility

After three years of covid postponements, the time had finally come on Wednesday 29 June 2022: Carel Stolker’s last speech as Rector Magnificus was buried according to tradition under the ginkgo tree in the library at the Kamerlingh Onnes building.

Organisation

On Tuesday, February 10, 2026, Professor Saskia Jaszoltowski, the new Visiting Professor for Central European Studies at Leiden University joined students, colleagues and friends of Austrian Studies at Leiden for a lunch-time talk that introduced her exciting research to our community.

As eLaw Postdoc researcher exploring the multiple intersections between law, gender, and technology, Carlotta Rigotti has recently participated in a groundbreaking international workshop focused on combatting image-based sexual abuse (IBSA) at the CAIS premises in Bochum, Germany.

On 18 January 2025, the Annual Reconnect & Gala of the Advanced MSc International Relations and Diplomacy (MIRD) celebrated over 20 years of bringing together current MIRD students, alumni, and faculty members. This year’s discussions focused on the theme: 'The Future of IR: Digital Innovation, Climate…

The International symposium on artistic research methods organized by ACPA and the Platform for Arts Research in Collaboration (PARC), in coordination with Fontys Tilburg and SAR– took place on 9th April, 2024 at the Textile Museum in Tilburg. The recordings are now online at whatmethodsdo.com.

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.'

After a gap of five years, Leiden has a new Professor of Modern China. Florian Schneider started his position on 1 September.

Speculation about alien life, a new nitrogen map, AI as a thesis supervisor, groundbreaking telescopes and multi-million-euro investments to combat antimicrobial resistance – the diversity of these topics shows that our readers are just as broadly interested as our researchers. Discover the most-read…

Developing a digital guest lecture for high school students. Jan Sleutels was immediately enthusiastic when he got asked to do this. The end result? Together with his colleague Maarten Lamers, he created the guest lecture 'Thinking about Artificial Intelligence'.

Annetje Ottow is the first female president of the Executive Board of Leiden University, which means a return to her Alma mater.

On 8 March, International Women’s Day, equal opportunities for women worldwide, empowerment, and gender equality take centre stage. For years, the role of women in the past has been nearly invisible. Four archaeologists reflect on this inequality of focus, from hunter-gatherers in the palaeolithic to…

In 2007, a spy from the Dutch General Intelligence and Security Service (AIVD) planted a destructive computer virus at an Iranian nuclear site, halting the Iranian nuclear weapons programme. Dutch newspaper ‘de Volkskrant’ has revealed that the AIVD kept the crucial role of the Dutch spy a secret from…

Exploitation of smaller game is rarely documented before the latest phases of the Pleistocene, which is often taken to imply narrow diets for earlier hominins. In a study now published in Scientific Reports, a team of German and Dutch archaeologists present new data that contradict this view of Lower…

Playing a game, picking a cutting for your room or just having a cup of coffee: it is all possible in the new Humanities Living Room in the Matthias de Vrieshof. From Wednesday 17 May, staff and students will be able to meet informally and socialise here.