Principles of Environmental Sciences provides a comprehensive picture of the principles, concepts and methods that are applicable to problems originating from the interaction between the living and non-living environment and mankind. Both the analysis of such problems and the way solutions to environmental…

The CS-NL network is a vibrant and active community of Citizen Science practitioners, initiators, researchers and participants from across all corners of society (Academia, Industry, Government, Civil Society, and Citizens) who come together to share knowledge and know-how for participatory research…

Is it possible to formulate a new conceptual foundation for attributing an evaluative role to historiography of science, without relinquishing the historiographic sensitivity of recent work in the discipline?

The overall objective of ECS is to widen and strengthen the European Citizen Science community through capacity building and awareness raising activities such as the creation of a European Citizen Science Academy and the establishment of a network of 28 ECS Ambassadors.

What tools can be applied to measure the output, outcome and impact of science communication efficiently and effectively?

How can we bridge the gap between experts and the general public?

PathOS aims to contribute to a better understanding and measurement of Open Science impacts and their causal mechanisms. This is pivotal in order to develop effective OS policy in the EU (European Union). It will do so by collecting concrete evidence of OS effects, by studying the pathways of OS practices,…

The mission of the Plant Science research programme is to contribute to the sustainable production of high quality crops, flowers and high-value bio-based products. This is realised by generating fundamental knowledge of basic biological processes related to development of plants and their interaction…

Dutch knowledge institutions are taking steps to recognise and reward open science. On 13 December, the Open Science NL Steering Board approved a total of 1.2 million euros in grants to 23 institutions. The Centre for Science and Technology Studies (CWTS) leads the national coordination of the local…

In the research programme Microbial Sciences we perform state-of-the-art research in the field of biotechnology and microbial sciences.

We perform multidisciplinary research at molecular, cellular, and organismal levels of animal biology to increase fundamental understanding of health and disease.

The master's specialisation Data Science: Computer Science at Leiden University provides students thorough knowledge and understanding of statistical and computational aspects of data analysis, including their application in databases, advances in data mining, networks, pattern recognition, and deep…

This NWO-funded research programme focuses on the assumptions and methodology of the writing of history of science. History of science is in many respects a flourishing discipline: it currently yields an impressive volume of studies. Systematic reflection about the ways in which history of science may…

The research programme Statistical Science is concerned with the analysis and interpretation of masses of data, the quantification of uncertainty using probability models, and the development and benchmarking of algorithms and methods with these aims.

There are eight institutes at the Faculty of Mathematics and Natural Sciences:

The Faculty of Science

Promotor: G.A. van der Marel, Co-Promotor: J.D.C. Codée

The aim of this study is to further develop the Open Science Monitor, which started as a pilot study.

After your graduation, Leiden University would love to stay in touch with you. Alumni are an important part of the university; with your experience we can improve the education, and you can be part of a valuable network full of knowledge and experience. Find out what options you have to stay in touch…

What is and should be the role of universities in supporting business? How can business benefit more of relationships with science? And what is the role of policy makers in supporting a productive relationship between science and business? Professor Simcha Jong Kon Chin examines the interactions between…

The master’s specialisation Computer Science and Science Communication and Society at Leiden University bridges the gap between experts and the public by combining high quality research in computer science with extensive training in science communication.

Law, Institute of Tax Law and Economics

The extensive use of electronic communication channels and other devices has opened new possibilities for collecting data on human behavior. This information is sometimes openly accessible, but largely part of administrative registration systems that are not open to the broader public. The data provides…

Today, everybody and everything produces data. People produce large amounts of data in social networks and in commercial transactions. Medical, corporate, and government databases continue to grow. Sensors continue to get cheaper and are increasingly connected, creating an Internet of Things, and generating…

How do museum visitors interpret the authenticity of museum objects? How can we support visitors' meaningful interactions with real objects?

Research and design are becoming more and more important in international science education. In The Netherlands, two recently introduced subjects focus on research and design activities in the classroom: O&O (research and design) and NLT (nature, life and technology). This research aims to look at what…

The ability to collect and interpret huge quantities of data has become indispensable to society and academia. Leiden University is a knowledge and expertise centre for data science that places the emphasis on interdisciplinary collaboration and innovation.

From where litter ends up to which languages are spoken in Leiden and The Hague: over 50 interesting, surprising, complex and entertaining questions were sent in for the Citizen Science project to mark our 444th anniversary. Not one but two Citizen Science projects will be starting this year in Leiden…

Citizen science has recently become a widely used term, but what does it mean exactly? How does citizen science compare to crowdsourcing? And where does community archaeology stand in this discussion?

The majority of scientists, from archaeologists through to zoologists, collect enormous volumes of data. Their massive databases contain large amounts of information which is difficult for humans to filter. With a solid grounding in statistics and computer science, we can develop algorithms for analyzing…

On this page you find all the ways through which the Institute of Psychology aims to foster Open Science.

Jasper de Bruin, Guus Besuijen, Hans Siemons & Jeroen van Zoolingen (2012). De romeinse nederzetting bij het tegenwoordige Goedereede heeft waarschijnlijk een belangrijke functie gehad in de overslag en distributie van diverse goederen, waaronder keramiek en voedingsgewassen. De opgraving van deze nederzetting…

Are you thinking about studying Biomedical Sciences? Learn more and watch a short promo video.

Computational thinking, programming, and algorithms form the basic of many of the things that are shaping our world, the way we work, interact, organize ourselves, and even spend our free time with social networks, streaming media, and games. And this transformation is far from being complete, it is…

Are you thinking about studying Political Science? Watch the introduction video’s and learn more!

We perform multidisciplinary research at molecular, cellular, and organismal levels of animal biology to increase fundamental understanding of health and disease.

The majority of scientists, from archaeologists through to zoologists, collect huge volumes of data. Their massive databases contain large amounts of information which is difficult for humans to filter. With a solid grounding in statistics, we can develop algorithms for analysing and identifying patterns…

Are you thinking about studying Computer Science? Learn more and watch the videos. Note: As of September 2025 you can also combine this master programme with the Business Studies specialisation.

In Microbial Sciences, we perform multidisciplinary research to understand the structure and function of microbes at all levels of biological organization, from small molecules and cellular structures at atomic resolution to multicellular communities.

The Institute of Political Science is a vibrant department with nearly 70 academic staff in Leiden and nearby The Hague.

Kralen spreken tot de verbeelding. Ze zijn aantrekkelijk en persoonlijk vanwege hun kleuren, materialen, patronen en associaties. Je draagt ze op je lichaam, waar je ze voelt en anderen ze zien. Kralen zijn waardevol en verplaatsbaar, tegelijkertijd reizigers en souvenirs.

Leiden University will be recording a brand-new series of podcasts in 2019: Science Shots. Our top scientists will talk about their research in less than 15 minutes. Tip: something to enjoy on the train journey between Leiden and The Hague, our two University cities!

The Department of Archaeological Sciences seeks to achieve the highest standards of excellence in science-driven education and archaeological research across the globe and across all periods.

BE-OPEN is a structural project funded under the Erasmus+ Capacity Building in Higher Education action. The project is coordinated by the University of Novi Sad, Serbia. The main objective of the project is to develop conditions for the implementation of the core principles of Open Science at universities…

The mission of the Plant Sciences cluster is to contribute to the sustainable production of high-quality crops, flowers and high-value bio-based products, and to contribute to the maintenance and restoration of biodiversity in natural ecosystems. This is realised by generating fundamental knowledge…

PhD candidates carry out a programme of independent research and additional (limited) course work, culminating in production of a PhD thesis in typically 4 years.

The master’s specialisation Bio-Pharmaceutical Sciences and Science Communication & Society at Leiden University is a two-year programme which combines research training in chemistry with one in techniques of communication.

With the emergence of new methods and technologies such as improved DNA analysis and big data, archaeological research has changed radically in recent decades. The researchers from the Department of Archaeological Sciences at the Faculty of Archaeology use new scientific knowledge to answer fundamental…

At the Institute of Political Science we value our alumni. We can learn from you, and would like to contribute to your further development. And, of course, we want to lend a hand in connecting ‘our’ political scientists all over the world.