Imagine getting a notification on your mobile phone with your personal code for impending mental health problems or even depression: yellow, orange, or red. Science fiction? Not for scientist Eiko Fried. 'There is a real chance we can prevent some mental health problems before they occur.' Want to participate…

Leiden University has policies in place regarding travel restrictions for students and staff within the context of their studies, work or research. The basis of these restrictions are the Dutch Ministry of Foreign Affairs travel advisories.

Professor Herman Paul has been appointed Scientific Director of the Institute of History from 1 February 2025. ‘Especially in these times, transparency is essential.’

If you want to travel for work to an area with a security risk country or area with the color code orange and/or red, you need prior permission from the university.

During an evacuation, all employees and students gather at the square on the northern side of the Leiden University Library (UB, red line). In bad weather, gather in the Lipsius Building (blue line).

Lecture

During an evacuation, all employees and students gather at the square on the southern side of the Leiden University Library (UB, red line). In bad weather, gather at the Lipsius Building (blue line).

Lecture

Leiden University and the Leiden Bio Science Park can make a significant contribution to the earning capacity of the Netherlands. This is the finding of the National Investment Agenda presented today.

On this webpage, you will find more information about (types of) security, who to ask for advice and where to report incidents.

If you plan to make a business trip abroad? Ask your manager for permission in advance.

Education, Organisation

Organisation

Hundreds of students and staff from Leiden University gave a ‘whistle concert’ on 11 December against the planned cuts to higher education. Similar protests were held in other student cities on the same day.

The KNMI has issued a code red weather warning because of slippery conditions. This applies from 03.00 on Monday 15 February. All university buildings, both in Leiden and The Hague, will therefore remain closed until at least 12.00. Update: the buildings will reopen after 12.00.

Wolves in the Netherlands mainly feed on wild animals such as wild boar and red and roe deer. But in areas such as Drenthe where these are scarce they also prey on free-roaming cattle used for nature conservation

Recently the book “Privaatrecht 2050. De weg naar ecologische duurzaamheid” is published.

For over a year now, the James Webb Telescope has been sending stunning images that exceed astronomers’ expectations. The photos are fascinating to see, but what exactly are we looking at? Assistant professor Melissa McClure explains.

The Party Catering Administration Office has special catering packages for the Faculty Club, and an overview is presented below.

AI offers opportunities to make your work easier. However, there is also a downside to AI that may have consequences for your privacy and that of your colleagues. On this web page, you will find more information about the responsible use of AI within Leiden University.

As of 1 June, foreign travel is again permitted, albeit with certain restrictions. If you want to travel to a red or orange list area, the University’s International Incident Team (IIT) plays an important role. What do they take into account in your application? We asked Leo Harskamp, Head of Security…

Roderick Geerts, a PhD candidate of the Faculty of Archaeology in Leiden, takes us on a short journey through the rich history of the Red Sea port of Berenike in Egypt.

The James Webb Space Telescope continues to surprise us with stunning pictures, but of what exactly? Astronomer Nienke van der Marel shows with three images how massive stars lead short but explosive lives.

Dr Robert Heinsch and his team of IHL Clinic researchers at the Kalshoven-Gieskes Forum on International Humanitarian Law have won a prestigious Erasmus+ grant for cooperation partnerships in higher education in cooperation with the IHL Clinics at Ruhr-University Bochum (Germany) and Roma Tre University…

Researchers from the Netherlands Cancer Institute, the Leiden University Medical Center (LUMC) and Oncode have created a tracking system that can reveal how often cells have divided. This allowed them to find a yet undiscovered population of immune cells: young memory cells that behave like stem cells.…

From 26 to 28 May, second-year students of the Advanced MSc International Relations and Diplomacy (MIRD) participated in the programme's annual visit to Geneva, Switzerland.

Students from the Royal Academy of Art The Hague (KABK) designed the 450 lustrum logo.

Astronomer Joseph Callingham and his team have observed for the first time a clear signal from a giant burst from a star outside our solar system. This would have a devastating impact on any unfortunate planet orbiting the star.

How unique is the human capacity for learning and adapting to an environment? In field research – in the rainforest and Artis Zoo – primatologist Karline Janmaat is studying how humans and other primates adapt to their environment in their search for food. She will give her inaugural lecture as Professor…

The FGGA starter grants provide researchers with the opportunity to launch innovative projects that contribute to both scientific knowledge and societal impact. In this article, Allard de Graaf and Joy Lee share their experiences and ambitions for their research, made possible by this funding.

In the article “Neanderthals and Us: We’re More Alike Than Once Thought”, we are reminded that many negative traits, from unintelligent to unsophisticated, have long been attributed to Neanderthals in popular culture. However, recent studies bring to light an ever-increasing amount of evidence contradicting…

Anne Sytske Keijser, Mark Leenhouts, and Silvia Marijnissen have won the 2022 FILTER Translation Award for De droom van de rode kamer

Are you planning to go abroad for work for more than one month? Do you have some ancillary activities abroad? Or are you planning to move abroad? If you are going abroad on behalf of Leiden University, it is important to make the necessary arrangements for working there.

Kool made a conscious choice to work for a non profit organisation. Recently, inspired by the pandemic, she also made a career switch.

Facility, Organisation

Leiden researchers have developed a groundbreaking model to advance cancer immunotherapy. Using a 3D printer, they create mini-tumors within an environment that closely mimics human tissue. They have also developed a method to monitor real-time interactions of these mini-tumours with immune cells during…

Nausea, neurologic pain and hair loss: some of the severe side effects of chemotherapy. Not necessary, biochemist Liyan Zhang showed. Together with Leiden biologists and others, she achieved great results with a drug that is only active in combination with light. Zhang will defend her PhD on 4 July.

Fat is a very valuable food component, packed with calories, especially important when other resources might be scarce. Our earliest ancestors in Africa already cracked open bones to extract the fatty marrow from bone cavities. But now a new study published in Science Advances demonstrates that our…

Delve into the depths of black hole imaging as anthropologist Rodrigo Ochigame unveils the human decisions shaping its portrayal. Explore four alternative color choices at the 'Towards the Black Hole' exhibit, now showing at Rijksmuseum Boerhaave, Leiden.

The way the great masters of the sixteenth and seventeenth centuries learned to draw is more similar to a present-day drawing class or book than you might think. Professor of ‘Art on Paper and Parchment’ Yvonne Bleyerveld tells us about the art of copying and model books.

If a forged Vermeer or Rembrandt is discovered, it is world news. Yet tracing fakes has long been a low priority in art history. University lecturer Anna Tummers will receive an ERC grant of almost two million euros to change that.

Aesthetic attraction plays a big role in orangutans’ mate choice, behavioural biologist and PhD candidate Tom Roth has observed. But to discover just how big that role is, more research is needed into the emotions of the great apes.

On behalf of its students and staff, the Executive Board of Leiden University would like to express our condolences to all those affected by last Friday’s earthquake in Morocco. We would also like to offer support to all students and staff who have family or friends in the area. In the meantime, several…

On 5 October, mediator Johan Remkes presented his report on the nitrogen crisis and what he thinks is the best way forward. Leiden University professor and nitrogen expert Jan Willem Erisman responds to Remkes’s recommendations. ‘It’s a step in the right direction.’