Consumer grade smartwatches may not be as accurate as promised when measuring tiredness or stress. That is the conclusion of researchers Björn Siepe and Eiko Fried based on a comparison between smartwatch measurements and self-reports by users.

During her work for the European Union, Sophie Vériter witnessed how young people in countries like Ukraine and Moldova were exposed to Russian propaganda. After mapping out the EU’s disinformation policy, the PhD candidate now advocates for a revised approach.

In ten years, it is projected that ten percent of global civil aviation operations will be unmanned. Are the current international aviation laws and regulations up to these technological developments? Fernando Fiallos will defend his dissertation on 14 November 2019.

Archaeology is the only science that allows us to study the material traces left by most of human evolution. But what happens when we bring philosophy into the picture? A new series of papers demonstrates how philosophical reflection can enrich archaeological research - especially when grappling with…

In recent years, artificial intelligence has deeply permeated our society and the legal field is no exception. Bart Custers, Professor of Law and Data Science, spoke to ‘Mr. Online’ about AI and the law: ‘AI is currently a hype.’

Although Dick Schoof, of no party affiliation, has been nominated by the four coalition parties as the new Dutch Prime Minister, various experts have expressed doubts. Can he lead the new cabinet? Wim Voermans, Professor of Constitutional and Administrative Law, spoke to 'RTL Nieuws'.

Dying from viral infection due to organ failure and blood loss: we still know little about how it can happen. Among other things, Huaqi Tang developed an organ-on-a-chip to figure it out. 'These technologies can offer unprecedented opportunities to fight the viruses that threaten our society.' Tang…

‘Wadden Sea Sounds’ is the name of a new project launched by the Waddenvereniging in collaboration with researchers from Leiden University and the University of Groningen. The aim is to find out how underwater noise affects marine life in the Wadden Sea.

The Iraqi archaeological site of Nimrud was recently recaptured from IS. The site has been severely damaged. The question now is, what to do with it? Should it be restored? Bleda Düring spoke with Trouw about this complex issue.

Sonja Barend distantieert zich van het toneelstuk Sonja, dat gebaseerd is op haar boek. Dirk Visser, hoogleraar intellectueel eigendomsrecht, gaf uitleg in het AD: ‘De auteurs hebben het recht om te zeggen dat ze niet meer achter de productie staan.’

Leiden biophysicist Stefan Semrau was granted an NWO Vidi earlier this month. He will use the grant to study the role of electricity in embryonic development and tissue regeneration.

How can Ronald Mulder run his skates across an ice layer at 60 km/h? His skating blades get help from a lubricating layer of meltwater. In Leiden, physicists found this explanation to be incomplete. Theoretician Hans van Leeuwen and experimental physicist Tjerk Oosterkamp searched for a deeper answe…

Effectively treating a severe case of pneumonia is often challenging. Identifying the pathogen behind it can be difficult. PhD candidate Ilona den Hartog tried something new: ‘We searched for answers in substances our own body produces.’ PhD defence on 17 September.

The American president Trump is considering military intervention in Mexico to get rid of the drug cartels once and for all, but Mexico is not interested in other countries' interventions. According to Jelle van Buuren, Assistant Professor at the Institute of Security and Global Affairs, Trump's much…

This study is important because it seeks to uncover whether clinicians' communication influences neurobiological and physiological outcomes for patients.

As a student, Thijs Brocades Zaalberg was primarily interested in diplomacy surrounding conflicts. Through research on peace operations and subsequently the fight against guerrillas, he became increasingly involved with the most violent aspects of colonial warfare. Per 1 September 2024 he is appointed…

Lions in Kenya respond very differently to human land use, climate and conservation practices. That is the conclusion of thesis from Leiden biologist Monica Chege. A uniform approach is therefore insufficient. ‘Effective conservation only works when management is tailored to local conditions and developed…

Big celebration upcoming weekend: MIRD's 20th anniversary is on the cards. Four alumni from different periods tell what this unique two-year master's in International Relations and Diplomacy has brought them.

Following the format of Privacy Law Scholars Conference (PLSC) in the United States, PLSC Europe is a conference for stimulating work in progress. Discussants, rather than authors, kick off and lead a conversation on a paper. There are no panels or presentations by the authors. Attendees read papers…

On 9 February, 2015, the 440th Dies Natalis, Peter J. Katzenstein will be awarded a Leiden University honorary doctorate in recognition of his contribution to the social sciences in general, and to political science in particular. Professor Katzenstein (Cornell University) is one of the most influential…

Archaeology can help us reflect critically on our European identity. This is what David Fontijn will claim in his inaugural lecture on 18 March.

Leiden University is awarding an honorary doctorate to virologist Marc van Ranst. Van Ranst has been one of the main advisers of the Belgian government during the Covid pandemic. German Arabist Beatrice Gründler will also receive an honorary doctorate for her work in the field of Oriental Manuscript…

Lifelike gods, provisional professors and the city militia with weapons a clanking. Leiden put on a colourful procession and drummed up hundreds of citizens to celebrate the foundation of the first university of the Republic of the Netherlands on 8 February 1575. 'It wasn't a party just for the sake…

Australian cell biologist Melissa Little and Dutch physicist Robbert Dijkgraaf will each be awarded an Honorary doctorate at the Dies Natalis of Leiden University in February 2019. They are receiving these awards for their services to science.

Stéphanie van der Pas won the Leiden University Thesis Awards 2014 with her thesis

Emeritus Professor of Theoretical Physics Wim van Saarloos received an honorary doctorate from the University of Twente last Friday. In addition to his work at Leiden University, Van Saarloos was president of the Royal Netherlands Academy of Arts and Sciences (KNAW) until June 2020 and he led The Dutch…

Leiden University's professors will be going to elementary schools again to teach about science and research. During the class discovery-based learning will be central. The professors will go to several schools in The Hague. The classes are part of the university's celebration of its 445th birthday…

On 6 January 2025, Leiden Law School celebrated a special milestone: our 450th birthday! Our special anniversary year got underway with a panel discussion with Bonnie Honig, as well as a celebratory toast.

The Wall Street Journal reviews historian Eric Storm's new book 'Nationalism: A World History', which examines the complex history and development of nationalism and nation-states.

In 2024, many of our students and staff won great prizes and secured important research grants.

In 2023, many of our students and staff won great prizes and secured important research grants.

The lecture series 'Humanity in the Automated State' examines how AI and automated systems are transforming government and public administration and what it means to be human within these digitised institutions.

The Dies Natalis for alumni on 11 February was an online event. Almost 1,000 alumni tuned in to Bastiaan Rijpkema’s interview with Annetje Ottow, who had then been President of Leiden University’s Executive Board for all of three days. Alumni are part of her portfolio on the Executive Board.

2020 was an eventful year. You can see that in our photos: one and a half metres distance, an empty university, attending ceremonies online and working from home. The image editors have selected the twelve most eye-catching photos of the past year..

On Saturday 7 December, Leiden professor of Observational Astrophysics Ignas Snellen received the Hans Sigrist Prize from the University of Bern. The prize was awarded to him for his groundbreaking research on planets outside our own solar system.

Professor of Science Communication Ionica Smeets will be awarded an honorary doctorate by the Open University. She receives the award because she exemplifies how science communication can bridge the gap between experts and the general public.

Which teacher has the talent to really motivate their students or is able to combine current research in their lectures? These are important qualifications for winning the yearly university wide Teaching Prize. Dr. Karène Sanchez, lecturer French language and culture, is one of the nominees.

On Thursday, November 20, 2025, the Leiden Jewish Studies Network celebrated the launch of the book Still Lives: Jewish Photography in Nazi Germany (The University of Pennsylvania Press, 2025) co-authored by Ofer Ashkenazi (Jerusalem), Sarah Wobick-Segev (Hamburg), Shira Miron (Basel) and Rebekka Grossmann…

Conference

Professor Hester Bijl will be appointed Rector Magnificus of the Executive Board of Leiden University on 8 February 2021. She will be the first female Rector Magnificus of Leiden University. Bijl has been Vice-Rector Magnificus of the University since 1 November 2016. Carel Stolker, who has served as…

Three new initiatives will provide a more diverse view of Leiden’s academic history, literally and figuratively: a historical study on the background of students and scientists, a new book about the Academy Building, and two new sculptures of female scientists, Ewine van Dishoek, Professor of Molecular…

On 28 June 2024, Dr Kristof Gombeer spoke on State jurisdiction and the protection of people at sea at the 81st Biennial Conference of the International Law Association (ILA) in Athens, Greece.

Alumnus Ruurt Hazewinkel (90) has presented Leiden University with a special gift: a historic house on Leiden’s Rapenburg canal. He handed over the key to Rector Carel Stolker on Monday 25 January.

A fresh semester means a fresh faculty calendar. There is plenty to do at the faculty again in the coming months. Five interesting activities are listed below.

With Dies Natalis (Foundation Day) approaching, our year-long 444th birthday celebrations are coming to an end. We ran numerous activities, from a manhunt to an exhibition, and all our doctoral defences were given a 444 twist. A peek behind the scenes at the creatives and makers who helped make our…