On the 30th of December, we received the sad message that our Kenyan colleague, Kennedy Kaminju Kariuki died on December 28, 2023 in the NW hospital in Nairobi at the age of 35 years from organ and heart failure. Kennedy was a PhD candidate at the CML, Leiden University.

Leiden researchers Arjen Doelman, Tom Huizinga and Manfred Wuhrer have been awarded ERC Synergy Grants worth millions of euros for their research on preventing tipping points being reached in ecosystems and helping eradicate rheumatism.

From March 1, Alenka Prinčič will be the new Head of the Centre for Digital Scholarship (CDS) at Leiden University Libraries. Her expertise in the areas of Research Support, Research Infrastructures and Open Publishing as well as her longstanding experience as a manager are excellent starting points…

Organisation

In 2022, Leiden will be the European Capital of Science. An enthusiastic team from our Faculty is already busy planning the activities. Today we speak with Marin Visscher. As a project coordinator, he seeks the connection between university and society.

Four promising young researchers will be able to conduct two years of research at a university abroad thanks to a Rubicon grant from the Dutch Research Council (NWO). The Leiden laureates are Renske Janssen, Girija Josh, Anne van der Meij and Yana van der Weegen.

Research

High-quality education, research involving multiple faculties, collaboration between universities and central government funding to make all this possible: these were the topics covered in a working visit of the Standing Committee for Education, Culture and Science (OCW) to the Association of Universities…

At the age of six, Barbara Gravendeel already knew what she wanted to be: a biologist. The seed was planted in the garden of her childhood home: an old orchard surrounded by a large hedge. Since 1 May, she has been the scientific director (prefect) of the Hortus botanicus in Leiden, and all the pieces…

Did you get a taste for recording local wildlife with Expeditie Stadsnatuur? Join the higher education BioBlitz and help us discover what is growing, crawling and fluttering on our campuses.

Hans Slabbekoorn researches animal sounds and the effect of the noise we humans make on these animals. He is also committed to making his discipline more diverse.

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.

Sustainable rose smell that can be produced on a large scale. Tobias Fecker made this into a possibility during his master's thesis, which was a collaboration between the IBL and the TU Delft. He wins the fourth edition of the Krijn Rietveld Memorial Innovation Award.

Professor Jan Willem Erisman is happy with the freedom at our University. But frameworks are needed, he believes. That is why he makes a proposal for such a framework from the perspective of his own profession. In fact, he makes a proposal for a wonderful ambition for Leiden University.

Fish populations in lakes and rivers have declined in recent decades. This is probably due to light and noise pollution. The Horizon Europe grant enables ecologist Hans Slabbekoorn to investigate this and improve the situation for migrating fish. In order to do so, a seven-metre-long swimming tunnel…

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.’

Is polder rice a feasible circular alternative for cows on peatland? A pilot experiment started this week. On May 22nd, researchers from Leiden University and Wageningen University & Research (WUR) planted roughly 3,000 rice plants on the Polderlab near Leiden. The researchers want to test rice as a…

On 16 June, Leiden University opens the MIGRADROME: a unique, seven-metre-long artificial river. Researchers will use it to study how light and sound affect migratory fish. ‘We’re recreating a real river, but under fully controlled conditions.’

We have to do all we can to stop climate change. But: the Earth is more resilient than we thought. That is the surprising conclusion of an international team of ecologists and mathematicians, which included Leiden mathematician Arjen Doelman. The team discovered that ecosystems can still avoid tipping…

Four researchers from Leiden University have been awarded NWO Open Competition grants in the Science domain. This is for research into subjects such as immune cells in tumours, antibiotic resistance and magnetic semiconductors.

The Executive Board has appointed Ineke Sluiter and Arnold Tukker as distinguished professors at Leiden University.

From telescopes to science fiction: in just one semester, students with no background in physics or astronomy get to explore the universe. The first group of students started last month in the new minor Our Universe.

Each year, CML gives out three Stans Awards. The Institute's staff could nominate students and colleagues for the prices of best student thesis, best PhD paper and best outreach from the past year. Jury members Jan Willem Erisman and Nicole de Voogd made the final decision.

Sterre ter Haar has won the Rachel Carson Graduation Prize for her thesis on how rising levels of CO₂ affect the nutrient content of plants. For the Industrial Ecology student, the award is a crowning achievement after a difficult period of recovering from long COVID.

Michiel Veldhuis received the most public votes for the C.J. Kok Public Award and may therefore call himself Discoverer of the Year. Veldhuis researches how climate change affects savannah ecosystems in Africa and how we can protect them.

After the lockdown, it was again possible to receive graduates and guests at the University. In recent weeks, BSc and MSc graduates from various study programmes were festively awarded their diplomas in a special corona-proof setting in the restaurant of the Gorlaeus Lecture Halls building. This resulted…

Leiden University and Stadslab Leiden invite you to improve the Leiden and The Hague environment with 450 extra trees – a living reminder of 450 years since the Relief of Leiden and the foundation of Leiden University.

Medical drugs are expensive to make and can have an adverse effect on the environment. Researchers Stefano Cucurachi and Justin Lian have developed a framework to help the healthcare system assess the economic and environmental sustainability of medical compounds.

Lecture

How does the soil we grow our vegetables in, affects the health of our gut? And does a healthy soil gives crops a better quality and taste? These are some of the questions Soil ecologist Emilia Hannula and a big consortium will work on. With an NWO-KIC grant of 1.8 million, CML, IBL, FGGA, the LUMC,…

Panel

Netherlands and China can learn from each other to handle household and livestock wastewater more sensibly. In the FOREWARD project, scientists from Leiden, Wageningen, and China are working together with local partners on feasible solutions that advance the environment, health, and economy.

The financial sector, supply chains and ecology. Not necessarily topics you might associate with physics, yet it’s exactly what new professor Diego Garlaschelli is dealing with. The common thread? Complex networks.

What is the best way to restore dune ecosystems? The project TERRA-Dunes researches the role of soil microbes in the development of natural dune areas. Recently, the project went into a new phase: planting 412 oak seedlings grown in different type of soils.

How can you persuade researchers who are used to conducting research within clearly defined disciplines to adopt an interdisciplinary approach? Newly appointed distinguished professor Arnold Tukker explained.