On August 30, the online platform Historical Maps of Southeast Asia was launched. The platform provides access to over 1,400 digitised maps of Southeast Asia from the collections of the National Library Board Singapore (307 maps), Beinecke Rare Book and Manuscript Library - Yale University (150 maps),…

Roel Wouters (24), a biology student at Leiden University, is a finalist in the election for UN youth delegate for Biodiversity and Food. The digital polls open for a week on Friday 22 October. Under-30s can vote for Roel at www.stemroel.nl.

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…

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,…

The year 2023 saw the earthquake in Turkey and Syria, the Wagner Group rebellion and wildfires and floods as all the weather records were smashed. Our most-read stories were about the climate crisis and the elections: here’s the list.

Isaac McKean Scarborough has been working at the Institute for History as a lecturer since September 2021. Below he introduces himself!

From a new generation of antibiotics and more-effective vaccines to a map of dark matter and new light on Hindu traditions. Four researchers from Leiden University have received a prestigious €2.5m ERC Advanced Grant to develop their research.

Should we be growing rice and building materials instead of grass for cows? From invasive crayfish to cultural heritage and groundwater levels: ten graduating students explored the future of the Groene Hart, the rural region just outside the cities of Delft, Rotterdam and Leiden where they study.

Violent conflicts and civil wars in Chad impede most rural households' access to food security, agricultural activities and access to essential services such as health care. In her dissertation, Nakar Djindil Syntyche denounces this issue. She obtained her PhD on 24 November.

The Executive Board is visiting the university’s institutes to find out what is going on. On 8 July 2025, it was the turn of the Institute of Environmental Sciences (CML), one of the fastest-growing institutes at Leiden University. ‘Our main aim is to preserve our planet for future generations.’

Fewer CO2 emissions, less airborne viral transmission, and a more sustainable form of food production: seven consortia of researchers and societal partners will put a budget of 32 million euros towards developing technological innovations. Important Leiden research on circular electronics by Prof. Dr.…

On Thursday 19 October, the Crisis and Security Management programme welcomed back six alumni for an alumni panel.

By Royal Decree, Mirjam Sombroek van Doorm was appointed as a member of the Health Council of the Netherlands as of 1 January 2024. She has joined the standing committee for Ethics and Law as well as the temporary Brain Injury through Sports Committee. The Health Council of the Netherlands is an independent…

Paul Behrens and his team have won the Frontiers Planet Prize of half a million euros for their research into the effects of switching to a plant-based diet.

PhD student and research journalist Sebastiaan Grosscurt won a Tegel in May. In the data category, Grosscurt and his colleagues won the prestigious Dutch journalism award. 'For me, ecological research and journalism are two ways of achieving the same thing.'

After an extensive content analysis of the coalition agreement, a sharp fall can be seen in the focus on education & culture, science & technology and defence. This is the conclusion of university public administration professors Gerard Breeman and Arco Timmermans. They compared the content with all…

Micro- and nanoplastics cause stress to crops such as lettuce and carrots, PhD candidate Laura Julia Zantis found. This can lead to reduced growth and a lower nutritional value. Biodegradable plastics have this effect too, likely because of chemicals they release during degradation.

Symposium

Eighteen researchers from Leiden University have been awarded a Veni grant by the Dutch Research Council (NWO). This grant gives promising young researchers the opportunity to develop their ideas for a period of three years.

2021 was an eventful year once again for the Faculty of Governance and Global Affairs (FGGA). Hybrid, working from home, online education, on-campus education, face masks, self-tests, keeping distance, quarantine and the coronavirus. Words that have now become a standard part of our vocabulary when…

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).

Lecture, Research Seminar

Most people think of waste as something dirty that needs to be disposed of as soon as possible, but Olivia Yun-An Dung's dissertation aims to show that this does not always have to be the case. For this purpose, she focuses on Tzu Chi recycling in Taiwan. There, an army of elderly volunteers has been…

3 October University has become something of a tradition: a bit of science among the Leidens Ontzet celebrations. During the new and improved edition, the WetenschapsWarenMarkt (Science Market), visitors spoke to researchers about the nitrogen problem, making organs and the city’s connections with A…

Research on flora and fauna with attention for economic interests and partnership with the local population. This is all bundled in a cooperation programme of the Anton de Kom University of Suriname and Leiden University. Working together on the basis of equality is key. ‘A thorny challenge, but one…

Niels van Leeuwen is enrolled in the Master Public Administration: Economics & Governance. During the first stage of his master, he did an internship in the United States, at the economic affairs department of the Royal Netherlands Consulate General in Chicago. ‘There are more ways that lead to Rome…

In June 2024 the Faculty of Archaeology welcomed a new Assistant Professor. Dr Alejandra Roche Recinos, originally from Guatemala, will strengthen the Faculty’s expertise on the archaeology of Central America. ‘I want to explore the lesser known archaeology of Southern Guatemala.’

In his art, Rafael Martig shows how drastically human activity changes nature. Fieldwork during his studies reinforced this view. ‘On Ameland I found masses of meadow birds, but the greenery on the mainland was often a grass desert.

Imagine no one in the Netherlands would eat animal products anymore, what would happen? And would it contribute to more climate justice? That is the theoretical exercise that environmental scientist Jan Willem Erisman and landscape architect Berno Strootman are taking up. 'Sometimes you have to think…

The importance of science communication and cross-boundary collaboration, and the ‘mantra’ of diminishing social cohesion in society: these all came up at Leiden University’s 448th Dies Natalis. A panel discussion including Leiden’s mayor Lenferink, music and two honorary doctorates completed the special…

Fancy seeing how your job is done at a university abroad? Project Managers Christina Schlüpen and Jeannette de Wolf from the Leiden Institute of Chemistry did just that. They both spent a week shadowing a European colleague: one in Bologna and the other in Berlin. This was through the Una Europe alliance,…

Hunter-gatherers caused ecosystems to change 125,000 years ago. These are the findings of an interdisciplinary study by archaeologists from Leiden University in collaboration with other researchers. Neanderthals used fire to keep the landscape open and thus had a big impact on their local environment.…

The Dutch Development Bank's new SDG loan fund for green energy in the global south may not be as positive as it seems. Anthropology professor Marja Spierenburg raises concerns about its potential impact on local communities.

Research

A collaboration between linguists, geographers and anthropologists aims to uncover how languages spread across South America over thousands of years. Associate Professor Rik van Gijn is responsible for the linguistic side of this NWO project.

Framing Poland through the lens of post-socialism, as is common in the social sciences, has become outdated. This label no longer captures the rapid changes that have taken place since the fall of the Iron Curtain. Ola Gracjasz's research shows that people are redefining their national identity, blending…

In collaboration with: Leiden University Institute for Area Studies, the Netherlands & Mar Chrysostom Chair, Mahatma Gandhi University, India

There has been a lot of media attention for the report recently completed by the Institute of Environmental Sciences (CML) from Leiden University. However, it has long been known that Dutch surface water contains too many toxic pesticides. ‘We will have to improve our ways of life together with many…

What is the environmental impact of the fish on our plates? And is an electric car really more sustainable when we include the generation of electricity? Jeroen Guinée maps the environmental impact of products and technologies. He analyses them from raw material to waste disposal. He was appointed Professor…

Eva Loeve (22), a fourth-year student of Cultural Anthropology, worked for five months at Centre for Research on Multinational Corporations (SOMO). At the end of May 2021, the report "Spinning Around Workers' Rights" about working conditions in spinning mills in South India was published, on which Eva…

Recently, in the midst of coronavirus situation, Professor Corinne Hofman and her team became part of the NWO project Island(er)s at the Helm. Both the application process as well as the start of the project were challenged by the limitations set by Covid-19. ‘As a preparation we travelled through the…

In his inaugural lecture Professor of Environmental Sustainability Jan Willem Erisman calls for local solutions that give people more freedom in how they meet environmental, nature and climate goals. This would allow farmers to come up with their own solutions to the nitrogen problem. The idea ties…

When do we define a piece of nature in the city as a park? And when is something a tree or shrub? It may seem obvious, but in scientific literature the definitions vary quite a bit. That makes comparisons difficult. Environmental scientist Joeri Morpurgo looked at the differences and designed a general…

As Professor of Literature, Culture and Law, Frans Willem Korsten explores the interplay between literature and law. These are two disciplines that most people wouldn’t immediately connect, but Korsten can see a lot of common ground between them. ‘A fictional story can have a huge impact on law.’

How safe are the nanoparticles in transparent sunscreen, anti-odour socks and bacteria-resistant plasters? Although microbes are present on all organisms, the tools that estimate the safety of nanomaterials still hardly take them into account. Bregje Brinkmann explored the role of these microbes during…

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…

Whether a microbe is beneficial or harmful to a plant can now be predicted with high accuracy thanks to bacLIFE. This bioinformatic tool with an intuitive interface makes it much easier to unlock the secrets of bacterial genomes. A group of Leiden biologists presented it in Nature Communications.

Lawyer, economist, politician and women’s rights activist Lizzy van Dorp is the 100th entry in our Top 450. Who or what is your favourite?

According to a new study, for half of the world population the answer would be yes. For the other half: maybe? Leiden environmental researcher and head author Nicolas Navarre explains: ‘With improvements to crop yields, reductions in food waste, and changes in consumption patterns, 90% of people could…