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.

Over the past year, historian Fenna IJtsma delved into 'four centuries of historical greenery'. As part of the Heritage Deal, with input from biologists at Naturalis and others, she looked for inspiration and examples from the past to contribute to a future climate-proof city centre.

Ammonia has been feeding the world for decades as a fertiliser and is now rapidly emerging as a carbon free fuel for shipping and industry. But if we focus only on CO₂ emissions, we risk creating new nitrogen problems, warns nitrogen expert Jan Willem Erisman in the journal One Earth.

Alexander van Oudenhoven has been appointed as the new Director of Education of the Governance of Sustainability master's programme. Van Oudenhoven has been appointed for a four-year period, from 1 October 2022 to 1 October 2026. The programme is taught in The Hague.

Come to the Night of Discoveries art and science festival on 16 September. Various researchers from the university are speaking at the festival.

With a single sample of water or soil, researches can analyse the DNA of everything that is living in that environment. During her research, PhD candidate Beilun Zhao discovered a way to analyse not only the kind of species, but also the age of the species in a water sample. The method showed its first…

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…

Religious studies specialist and historian Tom-Eric Krijger talks about the new pope. Will he be a mediator or someone who dares to take a stand?

Two statues of gorillas abducting women: they were what led PhD candidate Dick van Broekhuizen to write a new type of history of nineteenth-century sculpture. ‘If you view nineteenth-century art history from a less narrow perspective, the narrative changes completely.’ PhD ceremony on 21 June.

Recently, the oldest parts of the Leiden University Archives have been preserved and digitised thanks to a grant from Metamorfoze. This makes an important source on the history of Leiden University – and academic life in the Northern Netherlands in a broader sense – widely available.

Mariska Kret, Professor in Cognitive psychology has been awarded the European Research Council (ERC) Public Engagement with Research Awards 2022. Kret convinces the jury with 'RecognizeYourself - Bringing science to the zoo. Involving the public into the study of great apes emotions'.

The sixth edition of the lecture series Duurzaamheid & Recht was held during the last semester. Once again, it attracted many students.

Sometimes fascination can lead to in-depth research. Such is the case with Wahyu Widodo, who came across the Islamic Walikutuban ritual in Java in 2019, on which he subsequently wrote his PhD dissertation. Widodo: ‘Besides community, it also breeds political loyalty’

Jelle Wouters (RTC Bhutan), Erik de Maaker (CADS Leiden) and Radhika Gupta (CADS Leiden) have been awarded a €260.000 grant by the Gerda Henkel Foundation for the research project ‘Perpetuating Highland Heritages of Bhutan’. This 4-year research project focuses on vernacular and unacknowledged heritages…

Organisation, Social

Education

Since 24 March, the Kamerlingh Onnes Building of the Faculty of Law has been full of hundreds of colourful jellyfish. But behind that enchanting sight is a serious message: the exhibition symbolises the loss of biodiversity in the oceans due to climate change.

A Leiden-Delft-Erasmus research team has been awarded a LDE Global Support Grant to develop reusable algorithms in the remote detection of non-orthogonal architectural features, taking place in the archaeological context of the northern extremities of the Andean, part of the Istmo-Colombian Area.

Geert de Snoo is making the transition from the Netherlands Institute of Ecology to the management of KNAW. Starting 1 October, the professor of Environmental Biology will begin his role as Director of Research Policy in a new, consensus-based management team.

Problems cannot always be solved from a desk. Students on the Master’s in Governance of Sustainability therefore went to various Leiden neighbourhoods, where they tackled topics such as litter, urban biodiversity and green spaces.

Often landscape restoration is seen as a quick technical fix, when a long-term and more sensitive approach is necessary. Within her PhD research, conducted over the past five years in South Africa, Ancois de Villiers explored how we can change this approach. ‘A damaged ecosystem can’t be "fixed" in…

With a self-converted red camper van, biologists and twin brothers Kevin and Marvin Groen go on a nature adventure in Eastern Europe. Together, they search for wild animals, beautiful nature and places to sport. From a long search for a bear in the Slovakian wilderness to the discovery that pelicans…

Can humans perceive single photons? What is our place in the universe? How can we make quantum computers more stable? Five researchers from the Faculty of Science have received funding for their research projects within the Dutch Research Agenda (NWA).

Roderick Bouman is collection manager of the Leiden Hortus botanicus. He keeps track of which plants there are in the garden, where they come from and makes sure visitors can find the right information about them. ‘We are like a regular museum,’ says Bouman. ‘Except that our objects are alive. That…

Building more in urban areas is, in most places in the Netherlands, the smartest way to tackle the housing crisis. This is evident from research conducted by Janneke van Oorschot, published in a partner journal of Nature. Remarkably, this does not have to come at the expense of green spaces in cities.…

Green cities and a well-protected food system: Roy Remme and Oliver Taherzadeh study ways to achieve these. But how can their scientific findings lead to societal change? They share their experiences with science-policy initiatives.

Attention to the colonial past may be increasing, but many aspects of it are still underexposed. Dutch newspaper De Volkskrant, in collaboration with, among others, Leiden researchers Anne-Marieke van der Wal-Rémy and Alicia Schrikker, therefore created a 'Canon of the Dutch Underexposed Past', which…

A pandemic of lianas is sweeping through tropical forests, reducing their ability to store carbon and limiting their role in mitigating climate change. Two recent studies from Leiden University highlight the issue. ‘We now understand why lianas are visible in satellite imagery.’

Ratna Saptari is since 2007 Assistant Professor at the Institute of Cultural Anthropology and Development Sociology. She has always been involved with issues of human rights and Indonesian workers' rights. This August she retired. But she won't sit still. She continues her voluntary work and wants to…

The development of the Humanities Campus is entering a new phase. On 13 June, the Municipal Council approved both the zoning plan and the visual quality plan. This means that the university can now go forward with developing the new construction and the central green square on the Doelen side of the…

Education, Research

Researchers from Leiden and Indonesia work together on a range of projects on topics such as disappearing languages and cultures, the role of Islam, circular economy, biodiversity and medicine. They also work on projects to improve legal education and make Dutch sources and Indonesian heritage accessible…

Education, Research

What should we do about litter in the countryside? Can you tell from camera images if someone is guilty? And what does your heart rate really look like? Get answers to these questions and more at the free ‘Wijsneus Festival’ on Friday 16 September at Leidse Hout Park.

Leiden University has taken 17th place in the UI Green Metric, a global sustainability ranking for universities. Over 1,400 universities from all around the world took part in the ranking.

The Durham Declaration was presented at the Climate Symposium marking the Coimbra Group’s 40th anniversary on 26 March. Leiden University is proud to be one of the first signatories of this declaration.

Exotic marsh frogs from distant lands are colonising the south-east of the Netherlands. This has been demonstrated by biology students from our faculty. Although the amphibians thrive in our little country, they are harmful to native biodiversity.

On May 8, the Faculty of Archaeology celebrated its yearly End of Academic Year Event. The event was a chance for staff and students to mingle, while enjoying a nice meal together.

The university campus at Leiden Bio Science Park will change rapidly over the next few years. A short film shows the transformation to a full campus. See what this mix of new university buildings, student accommodation and restaurants and cafés will look like. And sustainability and biodiversity won’t…

Zes onderzoekers zijn voor twee jaar aangesteld als themaleider voor de onderzoeksthema's van de faculteit Wiskunde en Natuurwetenschappen.

Although there is considerable evidence that nature in the city is beneficial to both people and animals, we still do not have an overall picture of those benefits. To rectify that, a Leiden PhD candidate and a student – armed with a cargo bike – are using The Hague as a life-size laboratory.

Twelve weeks of hard work later, the big moment has finally arrived: the third-year students of International Studies are ready to complete the 'Practising International Studies' (PRINS) consultancy programme by pitching their advice. We were invited to attend the presentations on behalf of Free Press…

On paper it is recycled, but in reality enormous quantities of plastic waste from the Netherlands end up in Asian seas. Researchers from the Leiden Institute of Environmental Sciences charted the fate of plastic food packaging waste from the Netherlands. They published their results on July 8 in the…

Russian literature is awash with disputes, riots and intense political debates. In the new Dutch podcast Schandaal en Controverse in de Russische literatuur, senior lecturer Otto Boele and film maker and journalist Kay Mastenbroek discuss the most talked-about Russian books published in the past two…

In a significant step toward restoring cultural heritage, PhD candidate Marie Kolbenstetter has played a pivotal role in repatriating a collection of 133 archaeological artefacts from the prestigious Musée du quai Branly in Paris back to their place of origin in southern Honduras. Her efforts underscore…

In 2025, Leiden University College (LUC) celebrates its 15th anniversary with the theme 'Global challenges, local impact'. To kick off this anniversary year, we have shared fifteen stories over the past few weeks showcasing how LUC students, researchers, and alumni contribute to societal challenges…

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,…