How dangerous are micro- and nanoplastics? Do they affect the environment? What harm can they do to our bodies? Questions that we can now finally answer because of Fazel Abdolahpur Monikh. Together with his colleagues, he developed a method to detect and quantify nano-sized plastics. Their paper has…

Alireza Nouri comes from Tehran, Iran, and is currently in his third year of the bachelor’s in International Studies at Campus the Hague.

Maurits Berger worked as a lawyer in Amsterdam and as a journalist and researcher in Egypt and Syria. Since 2008, he has been a Professor of Islam in Leiden. Now he finally gets to do what he really wants: bringing his social knowledge and experience with Islam to the academic world. His call to the…

Arco Timmermans, Professor by special appointment Public Affairs, discusses the lobby that is just getting under way and is aimed at the political parties' manifestos for the upcoming election in March 2021.

It was already the most cited publication ever written at our faculty, but now a new milestone has been reached. Last month, a paper by emeritus professor Jan Reedijk and his co-authors surpassed 10,000 citations — and the count keeps rising.

Researchers at the Leiden University Medical Centre (LUMC) have managed to culture human heart muscle cells on a massive scale. This is an exceptional achievement because it is very difficult to replicate heart muscle cells outside the body. Using a special technique, the researchers have now created…

Did you know that algorithms can help with the prevention of air pollution and ships sinking in the sea? A team of Leiden University researchers have worked together with the Dutch Ministry of Infrastructure and Water Management to look in data-driven inspection of ships. In this interview, Gerrit Jan…

The Military Information and Security Service (MIVD) prevented a Russian hacker attack on the Organisation for the Prohibition of Chemical Weapons (OPCW) in The Hague. Scientists Paul Abels, Willemijn Aerts, Constant Hijzen and Sergei Boeke of the Institute of Security and Global Affairs responded to…

When a bacterium becomes more resistant to one antibiotic, it sometimes becomes more sensitive to another. To better understand this interaction, researchers from the Leiden Institute of Biology (IBL) and the Leiden Academic Center for Drug Research (LACDR) under supervision of Daniel Rozen and Coen…

In the new board game Epoch – Early Inventors you explore the prehistoric landscape. You gather food and raw material to develop tools and skills, and you try to appease the gods. Dr Maikel Kuijpers was involved in its development from the start and he is very happy with the result. “There is a lot…

Arnold van der Valk on Food Council MRA.

Jos F. Brosschot has been appointed as a professor by special appointment on the chair ‘psychophysiological mechanisms of stress in daily life’. This chair has been created by the Foundation for Research into Psychosocial Stress.

Every year, student mentors are appointed for first-year students at Leiden University. These mentors help new students with getting started. Tatum Meijer is a student mentor, for the bachelor's programme English. Especially now, in a period of crisis, the role of student mentor is very important.

Leiden will be scientific capital of Europe in 2022. The theme of the festivities was announce on 28 October: Who Knows. After all, does anyone have a monopoloy on wisdom these days? Who decides what is true? And does anyone actually know what the future holds?

Liesbet van Zoonen is Director of the Leiden-Delft-Erasmus Centre for BOLD Cities. The Centre was founded in 2016 and has made a name for itself with such innovations as data walks and the ‘Your Neighbourhood – Your Data’ game and conducts research together with the Statistics Netherlands (CBS) and…

The Sharia, the Islamic legal system, pays greater attention to ethics than may have been thought. This was clear at the annual conference of the Leiden University Centre for the Study of Islam and Society (LUCIS). Academics from throughout the world considered the question of how modern Islamic law…

The amended Intelligence and Security Services Act (WiV) enacts a fundamental change in the relationship between the security services and politics. This carries the risk of politicisation of information, according to Professor Paul Abels. Inaugural lecture on 16 February.

During the 20th anniversary meeting of the Netherlands' Catalysis and Chemistry Conference, Marc Koper received the Netherlands Catalysis and Chemistry Award. ‘The ultimate candidate for the prize’, it says in one of the recommendation letters.

For the first time, astronomers have observed in three dimensions that gas from spiral galaxies is blown upwards and downwards at high speed, far out of the galaxy. They thereby confirm the theory of galaxy evolution: that star-forming galaxies create intergalactic gas flows by discharging gas along…

Kim Duistermaat will become the Campus The Hague Director on 1 April. In this new role, she will monitor Campus The Hague projects and drive them forward. ‘I think it will be great to contribute to the successful realisation of the concept of “one university in two cities”.’

Scientists of the faculty of Governance and Global Affairs research completely different subject, among which terrorism, cybercrime and migration. In the upcoming weeks we will give the floor to several of our very best researchers. In this episode: sociologist Daniela Vicherat Mattar.

The percentage of female professors at Leiden University has risen to 31.2 per cent. These are the results of the Women Professors Monitor 2021 published by the Dutch Network of Women Professors (LNVH). This puts Leiden University above the national average of 26.7 per cent.

Due to the corona crisis, they had to switch to online education halfway during their course: associate professor Marcel Schaaf and PhD candidate Michiel Hooykaas of the Institute of Biology Leiden talk about digital practicals, online lectures and their biggest obstacle: exams.

Light reflects from a mirror, but where exactly does this reflection happen? Well, it depends, Martin van Exter and Corné Koks discovered. Their precise calculations, published in Optics Express, are important for designing optical cavities for quantum communication.

A suitcase as a messenger of quantum science. That is the idea behind QuanTour, a project connecting researchers from 12 European universities. In December, the suitcase landed in Leiden. A month later, it is time to pass the baton to Copenhagen. But what happened to it in Leiden?

Synchronised heart rates and skin conductance tell us that people are attracted to each other. This explains why we feel a romantic ‘click’ with some people and not with others. This is the result of research by psychologist Eliska Prochazkova from the Leiden Institute for Brain and Recognition, which…

How will future technological developments influence our everyday lives? This is the key question during the Brave New World symposium on 2 and 3 November.

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.'

Leiden is European City of Science in 2022 and this will be celebrated under the name Leiden2022. During Leiden2022, various activities will be organised, such as lectures, workshops, excursions and exhibitions. On the occasion of Leiden2022, Postbus 71 will be opened: the place to go if you have any…

A higher level of legal firearm availability does not lead to more violent deaths in Europe but does lead to more female deaths.

James Webb life’s building blocks

Annelot did an internship with the crisis management team of ‘Rijkswaterstaat’. During her internship, she was involved in improving an app used for information management during crisis situations.

Some sectors have been hard hit by the pandemic, whereas others have grown. Yet there was no influx of workers from shrinking to growing sectors. This is the conclusion of research by economists from Leiden University. They published their results in the journal Economisch Statistische Berichten.

Visualising cell proteins without invasive techniques is possible with the help of fluorescence. During a lecture of the Natuurwetenschappelijk Gezelschap Leiden on 18 January, winner of the Spinoza Prize 2017 and founder of the field of single molecule optics Michel Orrit explained how this works.

Joanita Vroom and Mink van IJzendoorn have been awarded a grant of the Chastelain‐Nobach Fund, enabling them to continue their work at Gortyn, Crete. This project offers students opportunities to help uncover the archaeological mysteries of this important Roman and Byzantine city.

During Pinochet’s dictatorship (1973-1990) numerous left-wing Chileans fled to Europe. In exile some of their political views became more moderate. Mariana Perry defended her PhD about this topic in September.

Kalsang Gurung is the first Tibetan to obtain his PhD in Leiden. He carried out research into the accounts of Shenrab Miwo, the founder of the Bön religion. Gurung demonstrates that these accounts do not reflect historical reality. PhD defence: 31 May.

In 2020, the organizing committee of ICEHL-21 made the decision to host the conference in 2021 as an online conference. After careful consideration, and taking the feedback of participants into account, the organizing committee has made the following practical decisions:

More CO2 in the atmosphere is making food crops more calorific, less nutritious and potentially more toxic.

Mysterious protein fibers show up in the brain cells of people suffering from Alzheimer’s' disease and other neurodegenerative disorders. Leiden physicist Louise Jawerth has been awarded a Vidi grant to find out how these fibers form in the first place.

Thijs Bosker and Paul Behrens, Professors in Environmental Sciences at Leiden University College in The Hague, have received funding from the Leiden University Fund and the Gratama Foundation to work on developing a set of Local Actions: tangible and practical exercises that students can engage in…

A circular economy in which all resources are reused is a prerequisite for a sustainable world. As EU president, the Netherlands can give a firm impetus to this economic shift. This is the message of Leiden Professor of Industrial Ecology, Arnold Tukker, in his inaugural lecture on 26 February.

A large research group involving Leiden University as corresponding Host Institution has been awarded a major European grant, the ERC Synergy Grant. This for research on how Europe developed after the fall of the Roman Empire with special attention to the yet underexplored but undoubtedly important…

Using E. coli bacteria to convert a toxic compound in the soil on Mars into oxygen to make life on the planet possible. A team of thirteen Leiden students are taking part in the annual iGEM competition with an entry based on this idea. iGEM is an international competition for students where they use…

IBL-researchers revealed in a new study that insects are successful on land because their eggs became protected against desiccation. An extraembryonic membrane in the egg, the serosa, helped insects to make the transition from water to land.

Amid rising polarisation and discrimination, lawyer and human rights activist Lilian Gonçalves-Ho Kang You wants to show in her Cleveringa Lecture on 26 November how dangerous exclusion is.

Understanding the behaviour of tiny droplets in our cells could aid the search for new treatments. A team of Leiden researchers has developed a groundbreaking method to study how these droplets transition from liquid to solid. This change plays a role in various diseases, including neurodegenerative…

On the 1st of October a new project funded by the Joint Industry Programme (JIP) started at the IBL on the potentially negative effects of sound on fish. Behavioural biologist and bioacoustic specialist Dr. Hans Slabbekoorn leads the international research team.

Inviting a navy officer to talk about piracy, inspiring critical thinking and offering to help with finding internships. Students appreciate that and therefore nominated Anita van Dissel, who teaches Maritime History, for the Lecturer of the Year Award.

Dutch people are proud of the fact that genever, their national drink, was the prototype for gin, the now so fashionable British spirit. And Leiden people are proud of their Professor Sylvius, who invented genever in the seventeenth century. But is this really true?