An international team of astronomers, including Leiden PhD student Elia Pizzati, has observed several ancient quasars that, surprisingly, appear to be floating alone in the early universe (less than a billion years after the Big Bang). Until now, astronomers, based on models, assumed that quasars are…

Pulsars were first discovered in 1967 and since then the population has grown and expanded over several wavelengths.

It all started with demonstrations protesting about the death of George Floyd from police brutality in Minneapolis, but the Black Lives Matter protest is spreading like wildfire across the whole of the US. Every day, thousands of people are taking to the streets. We asked American Studies expert Sara…

An international team of researchers observed the full extent of the evolution of hot gas produced by an active black hole for the first time. As it evolves, the hot gas encompasses a much larger area than previously thought and even impacts objects residing at great distances. Their study is published…

Libraries in the Netherlands are removing books that contain references to Black Pete. According to the director of the Public Library Association, a logical and fitting response in the spirit of the times.

How do we account for historical power dynamics when writing new histories of slavery and emancipation? What critical methods can we employ when studying preserved archives and collections? A new book series aims to address these questions. The initiators Karwan Fatah-Black and Ilse Josepha Lazaroms…

The Ager Venusinus Project studies the relatively small number of recognized colonial dwellings dated securely to the period of colonization (i.e. the 3rd century BC). With a special interest in the Black Gloss ceramic typochronology

Touring the campus, meeting current students and taking part in an interactive seminar in the Lipsius building. After 1,5 years of online events due to the corona pandemic, a live Student for a Day took place again on Friday 24 September.

Not everything that comes close to a black hole is swallowed by it. Black holes can also hurl material away, and that chance turns out to be considerably bigger than previously thought. Martijn Oei's accidental discovery and his subsequent research on it earned him a cum laude promotion on 12 Decemb…

When galaxies collide, do the black holes at their centre form a supersized black hole? This is what we think happens, but it's not as simple as that, according to Simon Portegies Zwart. Zwart, computer scientist and astronomer, has been awarded a VICI grant to research this phenomenon.

They hurtle along at over a thousand kilometres per second: the fastest stars in the Milky Way. PhD candidate Fraser Evans conducted research into these elusive hypervelocity stars and discovered that they have a lot to teach us, about black holes and supernovae, for example.

The orbits of 27 stars orbiting closely around the black hole at the center of our Milky Way are very chaotic. As a result, researchers cannot predict with confidence where they will be in about 462 years. ‘That is astonishingly short,’ says astronomer Simon Portegies Zwart who collaborated on the r…

The Archaeology and Epigraphy of Jordan’s North-Eastern Desert and Beyond

George Floyd's death still leads to fierce protests against police violence and racism on a daily basis in the United States and abroad. We asked Paul Wouters how he experiences these developments and what this will mean for our faculty.

The Leiden astronomer Huib van Langevelde) has been selected as the new director of the Event Horizon Telescope (EHT). The EHT is a collaboration involving about 350 scientists from 18 countries. It combines the ALMA array in Chile with sub-millimeter telescopes around the world and published the first…

Promotor: Prof.dr. S.F. Portegies Zwart

Susanna Lindberg(ed.), Artemy Magun (ed.), Marita Tatari (ed.) With this book, we would like to resume the passionate conversation that Jean-Luc Nancy was engaged in throughout his life, with philosophers and artists from all over the world. Now that he has passed away, it is not enough for us to…

The abundance of images in our everyday lives-and the speed at which they are consumed-seems to have left us unable to critique them. To rectify this situation, artists such as Daniel Richter, Jaune Quick-to-See Smith, and Artur Zmijewski have demonstrated that painting is brilliantly equipped to produce…

The project seeks to come to an understanding of the archaeology of the desert and the ways in which its inhabitants engaged with their constraint, marginal environments through time. It compares and interprets site distribution and community organisation over a long time scale and across several different…

The Department of Business Studies focuses on research questions at the intersection of law and behaviour in the context of organizations and enterprises. The department brings together specialists in entrepreneurship, organizational psychology, marketing, strategy, economics, and finance.

As every academic year, the leadership team of the Young Academy Leiden is changing. As of September 2021, Dr. Annemarie Samuels (Associate Professor, Social and Behavioural Sciences), former Vice-Chair, will be the Chair of YAL. And Dr. Sarah Giest (Assistant Professor, Governance and Global Affairs)…

The Administration Office of the Social, Economic and Organisational Psychology unit is located in room 2A27.

Publication of Johann Natterer's (1787-1843) word lists of Amazonian languages.

Would you like to get in touch with ELS@Leiden? Or do you have questions about our lab? Please do not hesitate to contact us!

Following the mid-term review, one of the faculty's ambitions is improving diversity and inclusion in our education.

Blood, Sweat and Tears: The Changing Concepts of Physiology from Antiquity into Early Modern Europe

This research cluster centres on regional, national, and global intersections between a variety of artistic and cultural expressions and their role in society from 1800 onwards.

COI@Leiden organises activities and events throughout the year. These include a monthly seminar series on topics relating to conflict resolution and PhD labs to assist COI students in developing their research skills.

While it has traditionally been seen as a means of documenting an external reality or expressing an internal feeling, photography is now capable of actualizing never-existed pasts and never-lived experiences.

Lecture, PCNI Research Seminar

This thesis presents pioneering work on the panchromatic emission of some of the most luminous galaxies in the early Universe: star forming galaxies and active galactic nuclei.

For the first time, scientists have traced back a high-energy neutrino to its source in space. It was produced by a so-called blazar—a supermassive black hole. Researchers from neutrino detector IceCube report this in Science. ‘This is a milestone for neutrino science,’ says physicist Dorothea Samtleben…

The centre of our Galaxy is so dark and dense that it is almost impossible to observe what is inside. By catching the rare hypervelocity stars that are ejected from it, Elena Maria Rossi aims to unveil the mysterious environment around the supermassive black hole inside. But she’ll also be solving another…

The project examines the political conflict in the Red River Valley of Louisiana between the majority-black Republican Party and the overwhelmingly white Democratic Party by studying the composition and actions of each party.

PhD defence

Truth is stranger than fiction. In 1997 Juan Maldaceña discovered a remarkable dictionary that translates equation for equation the physics of black holes in string theory into the more conventional physics of quantum mechanics of interacting particles. The remarkable possibility exists that…

Piercing through the skull with an ice pick, administering electric shocks without an anaesthetic, or applying leeches to the uterus: these may seem like medieval methods of torture, but they are in fact therapies used in medicine. Willem van der Does writes about all of them in his new book. ‘Physicians…

Astronomers from Leiden Observatory have developed a new method to find distant quasars and better distinguish them from other objects that look like them, using machine learning techniques. The research result has been accepted for publication in the journal Astronomy & Astrophysics. It is the last…

This edited volume by Jeff Fynn-Paul pushes forward the debate on the role of entrepreneurs in making war and building states in Europe and the Ottoman Empire.

The drafting of a handbook that serves as the first guide to European law in the area of children's rights, taking into account the case law of the European Court of Human Rights and the Court of Justice of the European Union (CJEU), as well as the decisions of the European Committee of Social Rights…

A global perspective

The authors examine the efforts towards implementing minimum labor standards in global supply chains through the lens of corporate social responsibility

The Institute of Public Law comprises all areas of public law, with the exception of criminal law, and including labour law.

In the South African context, certain iconic images have been a dominant source for public understandings of historical events. The emphasis given these images tends to overshadow the historical value of other more personal photographic sources – like studio or amateur photography. This project looks…

The Cide Archaeological Project: Surveying the Turkish Western Black Sea Region

This thesis explores the theoretical and observational properties of distant massive galaxies that harbour active black holes in their centres and shine brightly at radio wavelengths.

This study examines the system and poetics of literary patronage in the Renaissance by presenting a comprehensive analysis of the poetry of Giannantonio Campano. In this way, it addresses two themes largely overlooked by modern scholarship.

Smart algorithms and powerful processors are just as essential for astronomy as big telescopes. Astronomers at Leiden University therefore constantly operate at the interface between astronomy and data science.

The origin and evolution of galaxies are closely linked to many different physical phenomena.