What should you do when you fall ill? And what can you expect from your direct supervisor? As both an HR adviser and someone with personal experience, Marian van de Walle outlines the key things you need to know.

Microscopic swimmers such as bacteria do not always swim alone. There are advantages to exchanging information and cooperating. Stefania Ketzetzi and colleagues now show in Nature Communications that human-made microswimmers, too, can cooperate.

Why and how do people collect things? Why does a museum display one object and not another? These questions are at the heart of the interdisciplinary research programme Museums, Collections and Society. The programme is holding a conference for scholars and the general public on 5 and 6 July.

Portraits that gaze at you and have moving stories to tell: HEAR ME NOW says what usually remains unsaid.

Sleep disorders have a significant influence on our physical and emotional health. Sleep should therefore receive more attention within lifestyle medicine, says Professor Gert Jan Lammers. He will give his inaugural lecture on Friday 20 May entitled: ‘Getting to sleep’.

How do you progress from an immense gas cloud somewhere in the universe to a star with planets? Research by Astronomy PhD student Martijn van Gelder sheds more light on the earliest phases of this process. He will receive his doctorate on November 24th.

On 17 June, primary school pupils in Leiden will get the chance to explore science in an interactive and engaging way. The exciting new show ‘Wetenschapswonders’ is the initiative of master’s students Boele Visser and Ilse Hordijk, from the Rino Foundation. ‘I’m happy to help build a bridge between…

Goldband, Skrillex, Róisín Murphy and... quantum: the latter may not be a band but is part of the Lowlands line-up nonetheless. Scientists from Leiden University are using the festival for research on the very smallest particles.

South African poet Antjie Krog will be the writer in residence at Leiden University in autumn 2021. Krog is famous for her poetry collections and books, which are often inspired by the history of South Africa. In her role as writer in residence, she will give the annual Albert Verwey Lecture and a series…

The guardian of our genome, the protein MutS, scans the DNA for spelling errors and makes sure they are corrected. An essential process for our health. Researchers at Leiden University Medical Centre (LUMC) have discovered precisely how this protein works by making MutS visible with cryo-electron microscopy.…

PhD candidate Joeri Schoenmakers works at the LIC and describes how his days revolve around new experiments, oxygen-free reactions and supervising students. The mix of freedom, variety and a close-knit team means he enjoys both his research and his teaching role every single day.

Quantum Rules lab van Leiden Universiteit biedt proefjes en experimenten voor middelbare scholieren om te leren over kwantum natuurkunde. Henk Buisman vertelt over het 5 jarige jubileum.

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.

The Schoof cabinet has presented its budget. As expected, higher education is facing severe cuts. In the coming period, the Executive Board will regularly look at the consequences of what it deems an irresponsible policy.

Just start somewhere: whether it's videos, board games, theatre performances, or festivals. That was one of the key insights Sophie Wintermans gained during the Science Communication Summer School. In her view, the Summer School is a great step for any scientist interested in science communication.

PhD candidate Daniël Gomon has developed statistical methods that could significantly improve research in fields like medicine and demography. ‘Mathematicians don’t like unrealistic assumptions,’ he says. Gomon will defend his PhD thesis on 19 June.

With the aid of physics and a minuscule magnet, researchers have discovered a new structure of telomeric DNA. Telomeres are sometimes seen as the key to living longer. They protect genes from damage but get a bit shorter each time a cell divides. If they become too short, the cell dies. The new discovery…

We, the Executive Board and deans, have recently heard from different sources that the conflict between Israel and Hamas continues to evoke strong feelings of tension, anxiety and insecurity within our university community. We take this very seriously and so are once again addressing you all.

On top of the Gorlaeus Building’s bike parking sits a hidden green surprise: Leiden’s largest rooftop garden. Since this academic year, the garden has been open to all students and staff.

‘Health, happiness and productivity. The focus is mainly on the latter, but to create a sustainable career you need all three.’ These were the words of Professor of Sustainable Careers Jos Akkermans at the opening of the Career Days. Students can visit these university and faculty days for workshops,…

Tjerk Oosterkamp's group is conducting what is perhaps the coldest research in the world. The researchers have cooled a sensor to below 2 millikelvin - almost as cold as absolute zero. This allows them to make extremely sensitive measurements. PhD candidate Jaimy Plugge helped build the setup: ‘We are…

Alex Geurds, hoogleraar Archeologie van Midden-Amerika, wordt vanaf 1 januari decaan van de Faculteit der Archeologie.

Are you working full-time? In that case you are entitled to 152 hours of leave per year. However, at Dutch universities, an additional 80 hours are added thanks to the collective labour agreement (cao). How does this work exactly? Emiel Turlings explains how leave works.

How do galaxies form? That is what astronomer Mariska Kriek will be researching in the coming years. She received an NWO Vici grant of 1.5 million euros to study galaxies in the early universe. ‘This research uses new and unprecedented observations from the James Webb Space Telescope (JWST). These allow…

Nikie Veld is an education coordinator at Biology. Her job now mainly revolves around getting students back to the Faculty. ‘In the corona era, we were constantly rearranging the timetables.’

The universities of Delft, Leiden and Rotterdam are working together to show their students what artificial intelligence (AI) means for their own field. Three AI minors will start in the 2022 – 2023 academic year and will answer questions such as: ‘How best can you use AI in your research discipline?’…

On Monday, Minister of Education, Culture and Science Robbert Dijkgraaf attended the start of Orientation Week Leiden (OWL), the introduction week for international students at Leiden University. He welcomed the students and spoke with them about their ambitions and the problems they face.

Three fundamental research projects at Leiden in physics, chemistry and medical science have received funding from the Dutch Research Council (NWO). They involve research on magnetic fields in the universe, the role of myeloid cells in cancer immunotherapy and the evolution of ancient proteins.

The European Research Council (ERC) has awarded an Advanced Grant to six Leiden researchers. It awards these significant grants to established principal investigators for ground-breaking, high-risk research.

Fungi germinating in the lungs of patients. Doesn’t sound too nice, does it? Luckily, humans can deal with this normally, and we are able to clear the infection before anything comes to harm. However, in people with health issues, Aspergillosis can cause a lot of damage, especially if the fungus becomes…

The antibiotic EVG7, developed in Leiden, has proven capable of fighting the dangerous gut bacterium C. difficile with only a minimal dose. What’s more, the bacterium is far less likely to return, a major issue with existing antibiotics. The research was published in Nature Communications.

A mega-dam around Europe is a possible solution as protection against rising sea levels. Whether that is really a good idea, was debated on by young professionals during the debate on the future of European coastal protection. 'A big dam may seem safe, but actually isn't,' argued debate winner Haye…

The Leiden Bio Science Park (LBSP) is eager for new talent. Therefore, as a member of the core group, Miranda van Eck is committed to improving cooperation between the faculty and the business community. How do we make sure we know how to find each other better? And how do we show our students what…

That a parrot can copycat sounds is nothing new. But vocal learning is not common in animals. Researcher Carel ten Cate of the Institute of Biology Leiden (IBL) of Leiden University has now discovered a duck species that can imitate sounds. ‘It started with an obscure reference about an Australian musk…

In het Leids Universitair Medisch Centrum wordt gewerkt aan de ontwikkeling van een nieuw malariavaccin dat effectiever is dan de huidige vaccins.

Packages of DNA strands containing silver, measuring just two or three nanometres in size. Leiden physicists Donny de Bruin and Dirk Bouwmeester create these packages, which can enter living cells on their own. They then activate the silver with light, causing the cells to break down. This could, in…

Museum De Lakenhal issued an open call for creative solutions to the problem of growth addiction. From over 500 submissions, they selected 15 artworks for the exhibition 'If things grow wrong'. These include the creations of Leiden researchers Peter van der Putten and Evert Jan van Leeuwen.

Jildau Bouwman has been named as professor by special appointment of the chair ‘Remote Health Monitoring’ at Leiden University. The systems biologist and TNO Digital Health Innovation figurehead will investigate how digital solutions can contribute to better healthcare at home. ‘Home care is often more…

What do you do if you want to reach the widest possible consensus on a decision, ensuring it represents all the feelings and ideas within your team? The Centre for Science and Technology Studies (CWTS) tried the Deep Democracy method. It proved successful: ‘Everyone had a say without us getting stuck…

A consortium of research infrastructures focused on water quality has received €4.18 million in funding from the Dutch Research Council (NWO). This grant will support the transformation of outdoor laboratories at Leiden University, NIOO-KNAW, Radboud University, and Wageningen University & Research…

Would you like to take concrete steps toward a sustainable university or do you have a broad interest in sustainability? Over 200 staff members have already joined the Leiden University Sustainability Network. And there is always room for more – even if you’re no expert on sustainability, says project…

With the appointment of Dennis Janssen as operational director at the end of last year, the management team at the Observatory is now complete. Janssen has been working at the university for over twenty years, but the faculty and the Observatory are new to him.

With a healthy dose of logic and creativity, mathematics student Lance Bakker shows how computers can prove complex mathematics. His method proves intricate formulas without calculating every intermediate step. It earned him a nomination for the Leiden Science Young Talent Award 2025.

From lectures by Robbert Dijkgraaf to a telescope on the ocean floor: during his double bachelor’s in Physics and Astronomy, Jelle Oonk discovered that the path to big cosmic answers sometimes runs through the smallest, hardest-to-catch particles—neutrinos.

Facility, Organisation

How do you get citizens more involved in energy transition projects? This is the central question of the new transdisciplinary research project EmPowerEd. As a consortium partner, Leiden University is focusing on effective and inclusive collaboration between citizens, municipalities and industry.

A splendid milestone after seven years of collaborative research on the sustainable development of the Indonesian economy. Professor of Industrial Ecology Arnold Tukker has been appointed as a guest professor at the Faculty of Economics and Business of Universitas Padjadjaran (UNPAD) in the Indonesian…

The SENSYN project has found a solution to few public datasets for criminological research: synthetic datasets. Marieke Liem talks about this unique innovation

The new Dutch government must act quickly to take rapid, far-reaching measures in three specific regions to tackle nitrogen emissions. This will create the space for a long-term strategy to deal with other urgent problems and the knot of obligations that the state will need to untangle. These are the…

Astronomers at Leiden University have detected rare isotopes of carbon and oxygen in our neighbouring stars for the first time, providing a new window to better understand the chemical evolution of the cosmos.The results are published today in the journal Nature Astronomy.