One of the most important puzzles in modern astrophysics is the nature of dark matter.

Promotor: K. Kuijken, Co-Promotor: H. Hoekstra

Promotor: Prof.dr. K.H. Kuijken, Co-Promotor: Dr. H.Hoekstra

In this thesis, the research focuses on the properties of dark matter and dark matter haloes and how they connect with the galaxies we can observe in the Universe.

We explored the Universe using weak gravitational lensing, a phenomenon that occurs when light from distant galaxies is bent by the gravitational fields of closer cosmic objects, much like how a lens distorts light.

On November 29, Stéphanie van der Pas receives the ASML Graduation Prize for Mathematics at the Royal Holland Society of Sciences (KHMW) in Haarlem. She proved that a new method to choose a research model works better than the usual standard method.

OP Grants NWO are awarded to 16 scientists in astronomy, computer science and mathematics, or a combination of these disciplines (multidisciplinary) by NOW Exact Sciences. The scientists received a total amount of 6 million euros.

In the Netherlands, attention to empirical legal research is growing. Growing attention to ELS in legal academia goes hand in hand with attention to education in the field of ELS. To what extent do Dutch law students obtain empirical-legal skills?

On Thursday 28 September 2017 the Institute of Public Administration of the Faculty of Governance and Global Affairs (FGGA) organizes the event ‘Good Governance in Asia and the West: What is the Difference?’ as part of the Leiden Asia Year. Below you can read the interview with professor Zeger van der…

On November 17, 2017, Professor Simone van der Hof gave a duo lecture with her colleague Professor Eva Lievens from Ghent University during the 'Children and Digital Rights' conference at the Information Law and Policy Centre, which is part of the Institute of Advanced Legal Studies (University of L…

The unemployment replacement rate data set, assembled by Olaf Van Vliet & Koen Caminada (version 1, January 2012), provides data on unemployment benefit schemes in 34 welfare states from the 1970s until 2009. The current data set includes all 27 member states of the European Union and 7 non-EU OECD…

We are interested in understanding the mechanics of soft materials, of which biological materials are prominent examples.

The Graduate School of Governance and Global Affairs offers PhD programmes that address the pressing societal challenges of our time.

In the late 19th and early 20th century, hundreds of thousands of Chinese labor migrants crossed the seas to the Dutch East Indies. On the tobacco plantations of northeastern Sumatra and in the tin mines of Bangka and Belitung, they endured long hours and harsh conditions. Their journeys formed part…

Tuberculosis is a major global health problem caused by the Mycobacterium tuberculosis complex, claiming more than a million lives annually.

We are a dynamic research group at the Leiden Institute of Physics. Our aim is to explore and understand quantum materials, including strange metals, high-temperature superconductors, and quantum critical electron matter.

Interested in the BSc Science for Sustainable Societies at Leiden University? Please check our admission requirements.

How is social cognition shaped by our knowledge of language and stories?

Covid-19 is een disruptieve ontwikkeling die hier en nu veel vraagt van zorgprofessionals, bestuurders en managers. Hoewel de crisis nog volop bezig is, is nu al duidelijk dat het Coronavirus een blijvende impact zal hebben op zorginstellingen en fundamentele vragen oproept over hoe we onze zorg optimaal…

Professor of Law and Society Maartje van der Woude (Van Vollenhoven Institute) will give a lecture at the Institute of European Studies of the University of California in Berkeley on 4 March 2019.

The Austrian Studies Fund supports the Special Chair for Central European Studies, invites visiting professors from Austria and connects with Austria Centres over the world.

SOLID: Solidarity under strain - A legal, criminological and economic analysis of welfare states and free movement in the EU. Analysing the ways in which immigration structurally challenges and changes the organization and conceptual boundaries of national welfare states.

Cooperation on education with China stimulates innovation and brings a different perspective and new content to classrooms.

On Monday, 1 February a beautifully designed and accessible book appeared about two centuries of student financing and apprenticeship in the Netherlands, entitled Kansen in het Koninkrijk (‘Opportunities in the Kingdom’). The book was presented to Job Cohen, a Leiden University professor and chairman…

The consequences of social tendencies for the legislation and institutions in the fields of social security, the labor market policy and pension reform are examined in this multdisciplinary research program..

Tan, former PhD candidate Grotius Centre for International Legal Studies, received the award for the best dissertation with his thesis on armed conflict, international humanitarian law and human rights law.

Kan artificiële intelligentie (AI) helpen om subtiele veranderingen in de gewrichten op te merken op MRI-beelden van patiënten met reumatoïde artritis? Die vraag gaan Leidse wetenschappers beantwoorden dankzij een subsidie van de Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO).

Are you a PhD or postdoc at the Leiden Institute of Chemistry? Join our community to amplify your voice, grow professionally, and build lasting connections within our institute.

Papyrology+, founded in 2014, is a collaboration of Leiden scholars studying (Abnormal) Hieratic, Demotic, Aramaic, Greek, Latin, Coptic, and Arabic papyri from a socio-historical, economic and linguistic perspective. Papyrology+ aims to explore new opportunities and directions in the study of ancient…

The Ancient Worlds Network brings together staff and graduate students in LIAS working on the ancient Mediterranean and Near Eastern world.

LION offers a PhD program in which candidates carry out independent research on a specific topic, culminating in a PhD thesis.

Analysing the ways in which immigration structurally challenges and changes the organization and conceptual boundaries of national welfare states.

What would a university be without its students? In 2025, we will celebrate 450 years of studying with an exhibition showcasing our students from the past centuries. How did they study in the past? And how do they study now? This outdoor exhibition will be on display from 23 April at the Hortus bota…

The Faculty of Governance and Global Affairs is one of a total of seven faculties of Leiden University, located in The Hague.

Leids onderzoek naar bestraffing komt tot stand uit verschillende disciplines. Het onderzoeksproject kent een juridische, criminologische, sociaalwetenschappelijke en filosofische invalshoek.

How do tax treaties have to be explained and implemented, and what role does the supranational regulatory process play in this? Which objectives are meant to be used in establishing tax regulations and to what extent are such legislative practices undertaken in a goal-oriented manner?.

A new special issue on translation and the cultural Cold War sheds light on the understudied and yet important role of translation in cultural transfer.

The research group ‘Quantum and Society’ explores the boundary between quantum technology and science communication.

Institute of Biology Leiden (IBL) is an internationally oriented institute for research and education in biology. We are part of the Faculty of Science at Leiden University.

From 16 to 23 October 2025, the Faculty of Governance and Global Affairs (FGGA) will host the second edition of Cyber Week. Following last year’s success, we will once again shine a daily spotlight on our teaching and research in the field of cybersecurity through LinkedIn and Instagram. Today’s societal…

From 16 to 23 October 2025, the Faculty of Governance and Global Affairs (FGGA) will host the second edition of Cyber Week. Following last year’s success, we will once again shine a daily spotlight on our teaching and research in the field of cybersecurity through LinkedIn and Instagram. Today’s societal…

We make a distinction between the following types of previous education.

Een uitbreiding van de NIMAR collectie van de Universitaire bibliotheken Leiden.