On the brink of war, what influences decision makers to attack another country? Using innovative theoretical angles, Femke E. Bakker explores whether the basic assumptions of democratic peace theory are indeed correct. She stresses the microfoundations of conflict, questioning the assumptions on…

On 5 September, spaceEU was launched at the Ars Electronica Festival in Linz, one of the world’s largest science, technology and media art festivals. This 1 million euro European-funded project is coordinated by Leiden Observatory. SpaceEU fosters a young, creative and inclusive European space community…

The SpaceEU project, coordinated by Leiden University, has launched an online toolkit with a collection of space-centred activities that engage people with the wonders of space. The toolkit is targeted at girls and underrepresented communities and can be used by schools, youth centres, museums, NGOs…

Festival

This book underscores the interplay between religion and politics (local and global) in the production, escalation, management, mitigation, and resolution of conflict.

Many of the journal's issues contain short contributions from practitioners of diplomacy. These practitioners' essays offer unique insights into the world of diplomacy and they serve as a source of inspiration for researchers.

Diplomatica: A Journal of Diplomacy and Society addresses the broad range of work being done across the social sciences and the humanities that takes diplomacy as its focus of investigation.

Learn all about the writing systems used in the famous wall poems of the city of Leiden.

Selected publications of the Cardiovascular and Metabolic Therapeutics group.

English Language and Culture is a multi-faceted programme in which you’ll study the language in all its variaties, from Old English to the many different pronunciations currently in use. You’ll also be shown British, American and Canadian literature in their cultural-historical context.

The people behind The Hague Journal of Diplomacy and its online platform.

On 4 March 2016, Melanie Fink presented her PhD research on legal accountability for human rights violations occurring during Frontex-coordinated joint border control operations at a workshop for recipients of the DOC scholarship of the Austrian Academy of Sciences.

Leiden astronomer Tim de Zeeuw has been appointed Knight in the Order of the Dutch Lion. He received the distinction on 14 May to mark his departure as Director General of the ESO European Astronomy organisation. The celebration took place during the 2018 Dutch Astronomers Conference in Groningen.

A team of astronomers led by Dutch scientists have directly imaged a giant planet orbiting at a large distance around a sun-like star. Why this planet is so massive, and how it got to be there, is still a mystery. The researchers will publish their findings in the journal Astronomy & Astrophysics.

A moon rock from the Apollo 17 mission, antique globes and the cosmos according to Wassily Kandinsky. Ewine van Dishoeck, Professor of Molecular Astrophysics, has put together an impressive exhibition at Rijksmuseum Boerhaave.

An unexpected phenomenon in a merger of a cluster of galaxies. An international team of astronomers led by Francesco de Gasperin has witnessed a gas tail of a galaxy, that slowly extinguished, but then lightened up again

Alessandra Silvestri, a cosmologist at the Leiden Institute of Physics (LION), has been awarded an NWO Vidi grant for understanding the expanding universe. A growing number of theories explain why the expansion of the universe is accelerating, while more and more relevant observational data is pouring…

On the occasion of the Women & Girls in Science Day, BBC Science Focus Magazine highlighted 6 prominent female chemists. Among them is Leiden professor Ewine van Dishoeck: 'Astrochemist investigating the building blocks of life'.

How can the support for a collaborative approach to global challenges be increased, in times when international organisations’ capacity to act is under threat? Gisela Hirschmann (Leiden University) and Cornelia Ulbert (University of Duisburg-Essen) suggest a number of options.

Various GTGC researchers convened panels and presented papers at the 14th Pan-European Conference on International Relations: The Power Politics of Nature, that took place online from 13-17 September 2021.

Of Sponge, Stone and the Intertwinement with the Here and Now. A Methodology of Artistic Research

We are pleased to invite abstracts for the conference ‘H2OLAW – Law-Science Interfaces within the Law of the Sea and Fresh Water Law’ hosted by the Grotius Centre for International Legal Studies, Leiden University. The conference will take place on 26 and 27 September 2024 at Leiden University in the…

Introducing the team's work on Comparison

The gripping story of a collective passion for freedom that shook the world.

We want to be an engaged community where we feel heard and enjoy working together. But how do we have an open conversation about difficult topics?

From 27 to 31 January, a workshop on the regulation of plastic pollution based on scientific evidence will be held at the Lorentz Center in Leiden.

How is Indian foreign policy made? This special issue of the journal India Review, edited by political scientists Nicolas Blarel (Leiden University) and Avinash Paliwal (SOAS University of London) features a number of interesting case studies that bridge the gap between Foreign Policy Analysis and India’s…

Political Scientist Gisela Hirschmann (Leiden University) asks how international organisations can be compelled to comply with respect human rights. She finds that this is done through ‘pluralist accountability’: external third parties such as courts, NGOs, or regional organisations holding international…

Political scientists John Gerring (University of Texas, Austin) and Wouter Veenendaal (Universiteit Leiden) evaluate the political implications stemming from the size of a political unit – on social cohesion, the number of representatives, overall representativeness, particularism ('pork'), citizen…

Citizens in multiple crime-ridden countries strongly support the militarization of security—that is, placing the military in charge of traditional policing duties. Yet, we know little about the determinants of such support. Do people approve of militarization even in the face of human fatalities? Political…

Citizens’s attitudes towards trade are not only about the (perceived) economic effect. Commerce also has a variety of security implications. Employing an original experiment, political scientists Matthew DiGiuseppe (Leiden University) and Katja Kleinberg (Binghamton University) demonstrate that security…

What makes some international organisations more likely to succumb to crises where others manage to survive or even thrive? And what can international organisations do to become resilient and withstand existential challenges? Political Scientist Gisela Hirschmann (Leiden University) studied the example…

With new algorithms and supercomputers, an incredibly detailed radio map of the universe was created. Now astronomers can look at radio data of galaxies with much more precision. This was published in Nature Astronomy by Leiden PhD student Frits Sweijen and colleagues.

We are grief-stricken that our PhD student Maolin Zhang passed away during the early morning of January 17th 2019. He died during a terrible fire that took place at his house in Hillegom.

Using the MUSE instrument on ESO’s Very Large Telescope in Chile, an international team of scientists, including many Leiden astronomers, have conducted the deepest spectroscopic survey ever. They focused on the Hubble Ultra Deep Field, measuring distances and properties of 1600 very faint galaxies…

For only the second time ever, astronomers have linked a neutrino to an object outside our Milky Way. These observations were made using telescopes both on Earth and in space. The researchers, including Leiden astronomer Sjoert van Velzen, were able to trace the neutrino to a black hole that is devouring…

Jean-Eric Paquet, a Director-General at the European Commission, visited Leiden University on 20 February. He was impressed by the researchers’ drive, the wide range of topics that they research and the strong collaboration with Leiden Bio Science Park.

The Joan van der Waals colloquium is an ongoing bi-weekly lecture series.

On Sunday 28 October, the annual open day of the Old Observatory in Leiden takes place. During this day everyone can visit the Old Observatory for free and enjoy activities in this historic building.

On Sunday 28 October, the annual open day of the Old Observatory in Leiden takes place. During this day everyone can visit the Old Observatory for free and enjoy activities in this historic building.

This project investigates the transposition of natural historical material, knowledge and vision, between different media (collection, scientific drawing, academic texts, the visual arts and/or literature) – a transmission that happens in the borderline between the traditional, emblematic worldview…

European integration is under pressure. At the same time, the notion of a European administrative space is being explicitly voiced. But does a shared idea of the public servant exist in Europe?

Leiden Observatory is the astronomical institute of the Faculty of Science of Leiden University.

Students in our Astronomy programme are trained by leading experts in cutting-edge astronomical research. We incorporate in our educational programme observations and data from the world’s foremost ground- and space-based telescopes as well as theoretical, computational and astrochemical modelling,…

The Heritage Quest project is a citizen science project in which volunteers participate in archaeological research.

Why do some civil wars experience quagmire, a situation in which belligerents are trapped in fighting? To explain this puzzle, Jonah Schulhofer-Wohl (Leiden University Institute of Political Science) analyses the overlapping strategic interactions between foreign powers and the warring parties. Studying…

The database research community has made tremendous strides in developing powerful database engines that allow for efficient analytical query processing.