Yousef Yousef (39), a successful entrepreneur in the water-quality industry, recently joined the Advisory Board at Leiden Law School. Read the interview about his career.

Dutch researchers are joining forces to conduct research together with a series of societal partners to keep the biological clock healthy in our modern 24-hour society. The BioClock consortium will receive a research grant of no less than 9.7 million euros for this. It is one of the projects that receive…

Using biomethane to produce ammonia, a crucial chemical in agriculture, could drastically reduce the climate impact of the process. In a study published in One Earth, researcher Robert Istrate shows it’s even possible to make ammonia production net-zero or carbon negative.

A group of biology students are working on a solution to the world’s plastics problem by getting bacteria to make biodegradable plastic.

On December 16, 2023, our respected and beloved former colleague prof.dr.ir. Bert Peletier passed away.

There’s a Stone Age house at Broekpolder, near the city of Vlaardingen. It wasn’t built by prehistoric people but by modern archaeologists from Leiden University and volunteers from a local initiative known as Broekpolder Federation. They used replicas of Stone Age tools, such as stone axes and chisels…

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…

People are keen to make a contribution that will be valuable for scientific research. Many thousands are taking part in the Major Flu Survey. Leiden researcher Anne Land is publishing on this subject in the Journal of Science Communication.

The Leiden Hortus botanicus has received an inheritance of 5 million euros. This is a gift from the estate of Carla van Steijn, who was a loyal visitor to the Hortus during her lifetime. In accordance with her wishes, the gift will be used for new activities and to optimise accessibility for less-able-bodied…

Hydropower plants need not be disastrous for fishermen and nature. For that, we need to place new dams more strategically, but also modify or even remove some existing ones. Valerio Barbarossa and Rafael Schmitt showed that with a computer model of the Asian Mekong basin.

The new institute manager of the IBL studied biology for six months, but went in a completely different direction: development cooperation and the financial sector. Three decades later, Resi Janssen is making a radical career switch. Or isn’t she? 'In ten years’ time I want IBL to be in a new, sustainable…

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.’

What motivates citizens to participate in a citizen science project on plastic pollution? And does that motivation change over time? Liselotte Rambonnet tried to answer these and other questions with her research on the Clean Rivers (‘Schone Rivieren’) project. Rambonnet is a PhD student at the Institute…

Does a communal garden provide cool air and warm neighbourly relations? Does an additional row of trees increase biodiversity? These kinds of questions are key in the COMBINED project, on which Leiden scientists and residents of The Hague, among others, can work for six years with 4 million euros from…

Researchers at LUMC are trying to decipher the biological clock. This knowledge can help deal with luxury problems, such as jetlag, but can also counter diseases. Molecular neurobiologist Erno Vreugdenhil explains.

A festival that combines music and science, and a digital 'time machine' for science history: four Leiden projects that focus on science communication have been awarded a subsidy in the context of the National Science Agenda.

Violette Defourt came to Leiden for her master’s just before Covid hit. Four years later, she is leading her own biotech company, which aims to radically speed up diagnostics.

In his guest lecture on 22 January André Kuipers took school pupils and students on trip through space. His mission was to interest his young listeners in science and technology.

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,…

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.

Assistant professor Joost Willemse firmly believes that as a teacher, you’re never done learning. ‘Students ask questions about things you’ve never thought of yourself. Ultimately, that makes you better at your job.’ That’s why he always encourages his students to ask questions. And it’s appreciated:…

In 2012, Swedish power company Vattenfall went to an investor-state tribunal in response to the decision of Germany to close three Vattenfall nuclear power plants on its territory. The tribunal now has to decide whether Germany’s decision is in accordance with the international Energy Charter Treaty.…

In an unpredictable environment bacteria evolve the same strategy as shareholders who try to protect themselves against unpredictable swings in the stock market. Experimental evolution biologist Dr Bertus Beaumont published an article on this discovery on 5 November in the journal Nature.

During the final session of the PRE-University Class Security Challenges in the 21st Century, students showcased their thorough analysis of contemporary safety and security challenges. The results were impressive, according to both the teachers and the assessors: ‘You almost forget that they’re high…

How does the government know whether science policy has the desired effect? According to Professor Barend van der Meulen, a variety of evidence about the effectiveness of science policy and proper gathering of this evidence are more important than a strict scientific method. Inaugural lecture 27 Ma…

Industrial sites are built for safety, but are they prepared for security breaches? As concerns grow over threats to national security, these sites are a target. The Securdomino project built a tool to prevent malicious attacks and rethinks how we define security.

A group of single-celled organisms organises its DNA in a similar way to higher organisms such as plants, animals, and fungi. However, the way packaged DNA is read out differs between the two related groups, Bram Henneman discovered. PhD defence on 5 December.

Het College van Bestuur laat door een postdoc een eenjarig vooronderzoek doen naar het koloniale en slavernijverleden van de Universiteit Leiden.

How can we supply the growing world population with sustainable energy? At Laurens College in Rotterdam, Prof. Marc Koper speaks with the students about the crucial role of chemistry in the energy transition. Guest classes like this are a good way for school students to learn about the academic world,…

A consortium of international researchers comes with a unique solution to the energy problem. By mimicking photosynthesis, they aim to produce sustainable fuels out of sunlight, water, and CO2. Their secret? ‘Soap bubbles’, says Leiden chemist Sylvestre Bonnet, who is part of the consortium.

Professor of Ecotoxicology Martina Vijver had planned an eight-week field work course for her students, but the corona virus threw a spanner in the works and Vijver had to come up with a new plan at short notice. ‘Without the help of my own network and that of my colleagues this would have been very…

CML grants three Stans Awards each year, known as the best PhD paper, best student thesis and best outreach from the past year. The CML staff nominated students and colleagues and this year’s jury Helias Udo De Haes and Gjalt Huppes made the final decision.

A true shower of awards for students from the Faculty of Science during the annual KHMW Young Talent Awards ceremony. On Monday, 25 November, no less than nine first-year students received a prize for the best academic results in their first year. In addition, there were graduation prizes for master’s…

In the next decades, thousands of wind turbines will be added to the North Sea. Environmental scientist Chen Li identified the most beneficial areas for their construction, focusing on material use, carbon footprint, and environmental impact. His paper was published in Environmental Science & Techno…

Ships are still emitting too much nitrogen oxide. Till now it has been impossible to measure this at sea, but that is set to change. Solomiia Kurchaba combined satellite data and developed algorithms to identify which ships are emitting too much. Kurchaba received her PhD on 11 June.

The enlargement of the EU to include ten East and Central European countries went smoothly. But further expansion is meeting resistance and Poland and Hungary are now abandoning a number of democratic principles. What are the reasons? Antoaneta Dimitrova, Professor of Comparative Governance, explains…

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.

How can we make our cities greener and more people-friendly? Two Campus The Hague projects have secured a grant from the Municipality of The Hague. The researchers and students from both projects are working with city residents to find sustainable solutions to local issues.

Mapping out the problem of plastic pollution requires a lot of data over a large area. That's why scientists are increasingly turning to volunteers for help, also known as citizen science. But what are the challenges for a researcher when he or she involves the public in research in this way? Four Leiden…

Researchers need to work in specialized environments when they work with dangerous bacteria and viruses. These microbes spread easily, so only in labs with a high biosafety levels they can be studied. Unfortunately, to look at the microbes properly, expensive microscopes are needed that are not always…

Eleven Leiden researchers have been awarded a Veni grant by the Dutch Research Council (NWO). The grant will enable them to develop their research ideas for a period of three years.

Bjørn Peare Bartholdy is Archaeology’s representative in the Open Science Community Leiden (OSCL) . We spoke with him about the value of Open Science and how to make a good start. ‘Open Science is headed to be a regular way of academic work.’ So better to jump on the Open Science bandwagon early on.

In dermatology, there should be a high level of multidisciplinary collaboration among institutes and specialists, Professor of Translational Dermatology, Robert Rissmann, will say in his inaugural lecture on 8 July. He is building an infrastructure that will put pre-clinical and clinical skin research…

With his clever measuring methods Ignas Snellen – together with his team – was the first to detect carbon monoxide in the atmosphere of exoplanets. For his pioneering work the Leiden astrophysicist has been awarded the Spinoza Prize, the highest academic honour in the Netherlands. The prize of 2.5 million…

The Sustainability Prize of the Leiden University Green Office and the Local Chamber of Associations has been won this year by student association Catena. In the shadow of the corona pandemic, Catena worked exceptionally hard to improve sustainability.

The theme of the Heritage Open Days Leiden on 10 and 11 September is sustainability. At four University locations guides will talk about the history of the buildings and how they have been renovated. And there is a first: tours in sign language.

A moon rock from the Apollo 17 mission, antique globes and the cosmos according to Wassily Kandinsky. Ewine van Dishoeck, Professor of Molecular Astrophysics, has put together an impressive exhibition at Rijksmuseum Boerhaave.

The dark matter of biology: clumps of sugar molecules that, for example, form sugary webs around pathogens. We know very little about them. Wouter Remmerswaal threw all his talent into the challenge – both in the lab and as a modeller – and succeeded. He received his PhD on 12th September.

Dutch mosquitos are more resilient to saltwater than previously thought. Environmental scientist Sam Boerlijst discovered this during his PhD research at the Hortus botanicus. This knowledge is crucial for understanding how mosquito-borne disease transmission might change in the future.

A partnership with the Leiden Leadership Programme: what does it bring you? Two partner organisations in the field of sustainability, Arcadis and Bioto, share their experiences: “It's great to be surprised by new insights.”