On 21 April 2022, the Democracy and Citizenship thematic stream organized a seminar which focused on the question of citizenship under conditions of global crises. Three researchers presented their work during this seminar: Marion Collewet “Participatory Value Evaluation of policy options for the…

The energy transition ranks high on the European policy agenda, but what does it take to get there? René Kleijn researches how we can extract, use and reuse raw materials in a responsible way. Since 1 March, he has been appointed professor of Resilient resource supply.

Recently the WTO panel report on India – Solar Cells (DS 456) was distributed. Under India’s Jawaharlal Nehru National Solar Mission (JNNSM), solar power developers were required to use certain types of solar cells and modules manufactured in India for power generation projects in order to ultimately…

Lecture, Tuesday Talks: Science Insights

Leiden University no longer wishes to collaborate with fossil fuel partners that are not demonstrably committed to achieving the Paris Agreement targets. Exceptions will be made only if a collaboration demonstrably contributes to the energy transition. This proposal by the Executive Board was discussed…

Education & outreach

Turkey's Belle Epoque and the Transition to a Modern Nation State

Following ASEAN Customs Transit System pilots in Cambodia, Lao, Malaysia, Singapore, Thailand and Vietnam, the ASEAN Customs Transit System (ACTS) system has now been formally launched for general use.

For the first time, scientists have traced back a high-energy neutrino to its source in space. It was produced by a so-called blazar—a supermassive black hole. Researchers from neutrino detector IceCube report this in Science. ‘This is a milestone for neutrino science,’ says physicist Dorothea Samtleben…

Understanding the proces of electrochemical reactions is essential to improve the technology for the energy transition. Fuel cell cars, for example use hydrogen produced from the electrolysis of water. Mariana Monteiro did fundamental research on the process and won two prizes with her thesis.

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Two things are needed to produce fuel from sunlight: an antenna that harvests light, and a light-driven catalyst. The most efficient antennae contain bacteria. An international team headed by Huub de Groot imitated them and discovered how they function.

The Kroese-Duijsters Symposia aim to provide researchers from different fields and different career stages to meet in an informal setting, to stimulate discussions and to start new collaborations. The Kroese-Duijsters Symposia started in 2022 and we are pleased to invite you to the 2nd Kroese-Duijsters…

Due to technological change, jobs and professions are constantly changing. For instance, it has long been known that some jobs are becoming redundant due to automation. Digitalisation and the rise of artificial intelligence are more recent developments that affect the labour market.

Dr Moritz Jesse, Associate Professor of European Law at the Europa Institute Leiden, was sharing his thoughts on the transition from asylum seeker to refugee from a perspective of immigrant integration in Prague.

We explore the particle physics and quantum world at the time of the big bang.

Prof. Ottervanger, professor emeritus of European Law and Dutch Competition Law has analysed 36 final court judgments concerning decisions by the Netherlands Authority for Consumers & Markets (ACM) in competition cases. The report was part of the review of the ACM that was conducted by the Dutch Ministry…

On Tuesday 10 March 2015 - 10h Ernst Worrell, professor at the University of Utrecht with a chair on

Sustainability researchers can play an important role in the energy transition. But what if their partners are not (yet) sustainable and science itself has adverse effects? This is the subject of an online talk by researcher Thomas Franssen on 16 December with a discussion afterwards. ‘Clean energy…

At the largest scales, two ingredients dictate the distribution of matter in the Universe. The first is dark matter, acting as an invisible scaffolding held together by gravitational forces.

Promotor: M.T.M. Koper, Co-promotor: J.B.F. Juurlink

The public sector is increasingly a multi-level system, with interactions between public and private actors on the national, sub-national (provinces, regions) and international level and various public, semi-public and private organisations that perform public tasks. In this minor students pay attention…

A radical reduction in the amount of meat, dairy and other products sourced from animals is possible in the coming decades, as people turn to an increasing variety of alternatives. This would unlock vast amounts of land that we could use to produce energy and remove carbon from the atmosphere. Leiden…

HomininSpace is an agent based modelling and simulation system in which fluctuating carrying capacity is the key attractor for hominin dispersal. A parameterized and spatially explicit reconstructed palaeo-environment models available energy in the form of secondary biomass using reconstructed climate…

In the search for sustainable energy solutions, the idea of artificial photosynthesis has been proposed as an approach with which to use water and sunlight to produce hydrogen.

A complete transformation of the steel cycle in the Netherlands with the ultimate goal of a CO2 neutral steel sector by 2050. For this purpose, the Growing with Green Steel program receives €100 million from the National Growth Fund. From Leiden, Professor of Industrial Ecology René Kleijn is involv…

Almost a century passed since the much-celebrated judgement in the case concerning the Factory of Chorzów was delivered. This 1928 judgement of the Permanent Court of International Justice affirmed the essential principle of ‘reparation’ in international law, claiming that ‘restitution’ is the preferred…

The "Van Marum Colloquia" are a collaborative lecture series between the LION and LIC institutes, focusing on fundamental and applied surface science.

It must be there. We just cannot see it: mysterious dark matter and dark energy in the universe. Henk Hoekstra is one of the many cosmologists who would love to know what exactly these substances consist of. He has received a European research grant of 1.3 euro million to find out.

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.

One of the largest roofs at Leiden University, that of the Snellius building, has recently been equipped with 590 solar panels and 57,000 sedum plants, making it the largest combined roof in the Benelux. The roof was officially opened on Monday 10 October by Annetje Ottow and Martijn Ridderbos, President…

The Student Cabinet, a shadow cabinet with students from the Dutch universities, has presented its first ‘coalition agreement’. As Minister for New Democracy, Leiden student Zeineb Romdhane says inclusion should form ‘the basis of our democracy’.

Jason Rudall, Assistant Professor of Public International Law at the Grotius Centre for International Legal Studies, has been awarded the Hsu Mo Prize at the 2023 International Law Association-American Society of International Law Research Forum in Taiwan.

On 9 May 2018, Roy van Keulen defended his doctoral thesis 'Digital Force: Life, Liberty & Livelihood in the Information Age'. The doctoral research was supervised by Prof. dr. A. Ellian.

Research by Dutch television programme ‘Nieuwsuur’ shows that local councils in the Netherlands often lack civil servants and experts to support the implementation of the energy transition. As a result, they have become more dependent on commercial consultancy firms.

Leiden University has participated in an international study carried out by the CARMENES consortium, which has discovered two small, terrestrial planets around Teegarden’s Star. The planets have masses similar to Earth and their temperatures could be mild enough to sustain liquid water on their surf…

Henk Hoekstra and Alessandra Silvestri work on the astronomy and theoretical physics in the Euclid mission. These Dutch researchers are part of the mission.

In the early universe, the dynamics of the Higgs field can give rise to many interesting phenomena.

Should Leiden University cut its ties with the fossil fuel industry forthwith? This was the main question in a debate between students and staff. The answer was clearer for some than for others.

What are key regulators of plant ageing that can reverse ageing in plants (rejuvenation), and how can we use this knowledge to improve crop plants?

On May 13 2022, Frans W. Saris will present the third of a series of "Hello World!" lectures, organised by the Media Technology MSc program of Leiden University. In his lecture titled "Computer Modeling to Save the World", Frans Saris addresses three alarming crises: energy and climate, biodiversity…