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The Old Observatory is located on the grounds of the Hortus. This is the oldest surviving university observatory in the world. Since 1633, the University of Leiden has used the various rooms for the education of students. The Visitor Center on the ground floor of the Old Observatory is part of the Hortus…

German scientists and NASA have developed a bacteria-killing coating for space toilets. With this coating they hope to protect astronauts in space stations from pathogens. Professor of Biological chemistry Nathaniel Martin sheds light on the discovery: 'You don't expect nasty bacteria up there, but…

On 15 March, the 28-year-old Australian right-wing extremist Brenton Tarrant committed a terrorist attack on two mosques in Christchurch in New Zealand. Jelle van Buuren, Bart Schuurman, Daan Weggemans and Tahir Abbas all working at the Institute of Security and Global Affairs (ISGA) have been approached…

The Vrouw Vennepolder near Oud Ade has been transformed into the Polderlab. Scientists and students from Leiden University, together with farmers and citizens, investigate how to manage peatland in a sustainable and profitable manner. A great opportunity for students to experience how scientific knowledge…

Netwerk en projecten duurzaamheid verduurzaming green office en green team

Lets hit the water! Our students joined us on Saturday 30 August 2025 for a Stand Up Paddleboarding (SUP) and canal clean-up session on Leiden’s canals with Plastic Soup Surfer Merijn Tinga.

Hot rocky exoplanets are planets that orbit so close to their host star that they possess a molten surface.

The new interdisciplinary bachelor's program in Science for Sustainable Societies starts in the 2025-2026 academic year.

After decades of intensive farming, the peatland area is under pressure. Researchers, farmers and policymakers work together in the Polderlab to identify future-proof types of agriculture. ‘It’s unbelievable how quickly the system bounces back without intensive fertilisation.’

In the Science for Sustainable Societies programme, you will develop the expertise with which you can contribute to a more sustainable world. You will develop a sound knowledge base in the relevant disciplines of natural and social sciences and gain an innovative perspective on environmental and sustainability…

An international team of astronomers including Leiden scientists publishes the image of a young star with a surrounding dust disk that is still being fed from its surroundings. The phenomenon around the star SU Aur may explain why so many exoplanets are not neatly aligned with their star. The European…

A consortium including economists, psychologists and public administration scholars from Leiden University will study public acceptance of the hydrogen transition in the Netherlands. They will look at the labour market impact, public perceptions of hydrogen and businesses’ willingness to invest.

In 2018, the Institute of Environmental Sciences (CML), born out of activism, exists for forty years. The institute celebrated this on 28 June in the Stadsgehoorzaal in Leiden. In the morning, proud directors and researchers looked back and forth. After this several experts discussed the current environmental…

A new study from Leiden researchers shows that the carbon emissions of building materials are set to grow if we do not act rapidly. Even with known interventions implemented in concert, these emissions are much larger than the remaining 1.5 degree budget for building materials at today’s share, the…

Is polder rice a feasible circular alternative to cows on peat soil? In May, an experimental trial began, with researchers from Leiden University and Wageningen University & Research (WUR) planting around 3,000 rice plants at the Polderlab near Leiden. The researchers aimed to test rice as a middle…

Animal species that are dear to us in the Netherlands often spend a large part or all of their lifecycle in other parts of the world. But their habitats worldwide are under increasing pressure, are often inadequately protected and much poorer than the global average. ‘If we truly care about these animals,…

A huge shiny aluminium object stands in the middle of the Polderlab in Oud Ade. Are the researchers trying to make contact with extraterrestrial life? Certainly not; they are using the ’Moon landers’ to measure whether innovative forms of agriculture reduce greenhouse gas emissions. Fleur van Duin works…

It is a warm day. The sun is shining brightly while biologist Marco Roos makes his way through the bushes towards a peculiar little plant. Insects buzz, birds chirp. In the background rises the LUMC: at the Bio Science Park in Leiden, people and nature come together in a special way.

Institute of Environmental Sciences (CML)

In the fight for a liveable planet, we desperately need a fairer distribution of wealth and equal rights for all, argues anthropology professor Marja Spierenburg. ‘That will also generate broad-based support for sustainable development.’

In 'The Spirit of Matter', Peter Pels explores the significance of emotionally evocative objects, challenging the denial of their existence in modern 'mind over matter' ideology.

Promotores: Prof.dr. C.U. Keller, Prof.dr. H.C. Gerritsen

Sheltering is an immediate human need and determines well-being andhealth.

Promotor: Prof.dr. E.F. van Dishoeck, Co-Promotor: G.J. Herczeg

This thesis investigates the evolution and fate of gaseous exoplanets, which are continuously shaped by stellar activity across both short and long timescales.

The EEE lectures are a monthly cross-disciplinary lecture series where globally renowned and inspiring thinkers and scientists are invited.

The effects of sustainability projects on poorer, marginalised people should be considered at a much earlier stage. This is the opinion of Marja Spierenburg, Professor of Anthropology of Sustainable Development and Livelihood, who will give her inaugural lecture on 25 February.

Each year a staggering 18 billion chickens, turkeys, pigs, sheep, goats, and cows either die or are killed without making it onto someone's plate. Environmental scientists Juliane Klaura, Laura Scherer, and Gerard Breeman were the first to calculate this number on a global scale. 'Reducing these numbers…

PhD defence

Greenhouse gasses in the atmosphere and fertilizers in the groundwater have negative consequences for our environment. With an electrochemical process they can be transformed to more valuable and useful substances like fuel and alcohol. Chemistry PhD candidate Elena Perez Gallent discovered how this…

PhD defence

Lecture, Harold Linnartz Astrochemistry Prize lecture

Many students are finishing their master thesis on sustainability this summer. In this blog, we reflect on their topics, approaches, and goals by highlighting theses from Governance of Sustainability, European Law, Global Archaeology, Computer Science: Artificial Intelligence, Industrial Ecology, and…