Over hundreds of thousands of years, our region witnessed the comings and goings of various types of hominin. This depended on the temperature as ice ages alternated with warmer periods. In ‘De eerste mensen in de Lage Landen’ (‘The First Humans in the Low Countries’) Leiden archaeologists Yannick Raczynski-Henk…

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…

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.

Rain or shine: in the course ‘The Ecology Project’ students of Leiden University College visit the nature of The Hague each week.

‘If you want to implement open science, you at least need someone at each faculty who can help researchers to solve practical problems.’ Dorien Huijser spent two years managing the transition to a new working method at the Institute of Psychology’s Brain and Development Research Center.

Each year on the university’s birthday, children at primary schools in Leiden and The Hague have a lesson from a professor – about children’s rights and robots in surgery, for example. The children get to do activities. And ask questions: ‘How do you become a professor?’

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

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.

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.

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…

While tens of thousands of visitors dance to deafening music, a team of Leiden psychologists are trying to collect data for their research at Lowlands. How do festivalgoers experience a virtual trip? And what role do factors such as too little sleep and whether they have experience with psychedelics…

Finding solutions to the Israeli-Palestinian conflict is the not-inconsiderable task of the new Peace Academy in The Hague. Professor Maurits Berger and twelve students from different conflict zones are starting a creative thinking process that aims to discover the basic conditions for peace in the…

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.

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…

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

On Thursday afternoon, 6 October, Lara Wierenga, Anne Urai and Niels van Doesum kicked off the first edition of Psychology Connected, a recurring event organised by the Science Committee, where big questions and small conversations easily alternate.

‘Safe working is a form of professionalism,’ says Hugo M. Nijhof, head of the Health and Safety department. Starting next year, there will be more focus on this topic. New opening hours will be introduced for the buildings, along with new rules for working outside office hours. Nijhof: ‘Together, we…

Archaeological finds off the coast of Java, Indonesia provide insight into the world of Homo erectus, 140,000 years ago. Skull fragments and other fossil remains provide a unique picture of how and where these early humans lived, says Leiden archaeologist Harold Berghuis.

Mechanics play a larger role in blood vessel formation, and other developmental biology, than previously thought. Cells appear to respond to mechanical signals, such as pressure. Through the extracellular matrix, a network of fibrous proteins, cells can supposedly exchange those mechanical signals over…

Around 1,300 Leideners found 2,265 species during the Expeditie Stadsnutuur urban biodiversity inventory. ‘It’s been a huge success’, says scientific coordinator Frederic Lens.

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.

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.

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.

Lunch walk

PhD defence

PhD defence

PhD defence

EDGES Talk

Green Friday

Lecture, Comparative Indo-European Linguistics (CIEL) Seminars

The digital age offers unprecedented opportunities: information is always accessible, systems are interconnected, and processes are automated. However, these developments also give rise to new threats. During the Night of Digital Security on 26 May at the Wijnhaven building, more than experts shared…

Space for open dialogue on historical slavery was created at the Keti Koti Table at Museum De Lakenhal, organised by Leiden University and the Municipality of Leiden. There, just metres away from 17th-century paintings, Leideners shared a ritual meal and spoke about the effects of slavery and our colonial…

Geopolitical situations, such as the conflict in Gaza, evoke strong emotions among staff and students. How do we discuss such situations at our faculty? This issue is an ongoing part of safeguarding academic freedom at our university.

Did you also read a lot this summer? We made some real headway on our bookshelves. After all, nothing beats reading a beautiful or thrilling book outside. In this reading list, you'll find our favourite books for the summer of 2022. If you have any suggestions, let us know via Twitter, Facebook or I…

‘It was the biggest bunch of flowers I’d ever seen,’ says Emily Strange about the moment she won the Leiden Teaching Prize 2022. The judge praised the conservation biologist for her passion, engaging personality, and the way she motivates her students. On the Dutch Day of the Teacher, we get to know…

LUNHA strives to redefine global health by prioritizing justice, fairness, and inclusion in Africa. Through collaboration with diverse stakeholders, LUNHA aims to reshape global health research and foster a broader engagement with social sciences and humanities.

In the spring of 2024 the Faculty of Archaeology welcomed a new postdoc. Dr Adam Benfer, originally from the United States, occupies a double position as a researcher in the project of Alex Geurds and as the Faculty’s Data Steward. ‘It is pretty much what the title says: I steward data. Essentially,…

Leiden University contributed to colonialism and slavery through its research and teaching. And governors and residents of Leiden had an active role in colonial networks. These are the findings of two explorative studies presented on 3 April.

Workshop

Winterborrel

Debate

Walk

Lecture, Seminar and book discussion

Arts and leisure, Arts and leisure

Webinar

PhD defence