Ice, the solid state of water, plays an important role on our planet as well as the entire universe.Despite the fact that an individual water molecule has a very simple structure, its chemical bonding in the solid phase can be surprisingly complex.

Promotor: E.R. Eliel, Co-Promotor: M.J.A. de Dood

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

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

Fatemeh (Simin) Tabassi Mofrad has recently received a project grant (€ 25,000) from LUF/Gratama Foundation for her ideas in investigating sex-by-genotype interactions in brain functions. She has a multidisciplinary research perspective which enables her to look at research issues from different angles.…

An international partnership of brain researchers from 35 research centres - from the US to China - including the Leiden Institute for Brain and Cognition (LIBC), has collected resting-state functional MRI data from more than 1400 healthy volunteers and put the information online so that it is available…

The nanoscale structure of a catalyst under reaction conditions determines its activity, selectivity, and stability. For the production of sustainable energy and materials, new catalysts are needed. By understanding the structure-activity relationships of catalysts under reaction conditions, insight…

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…

Are disturbances to the brain, such as Alzheimer's or autism, linked to specific defects in the underlying communication networks in the brain? If this is the case, subtle changes in the networks can act as a marker for brain disturbances. Neuroscientist Serge Rombouts will be investigating this, together…

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…

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.

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

The lipid matrix of the skin's stratum corneum plays a key role in the barrier function, which protects the body from desiccation. The lipids that make up this matrix consist of ceramides, cholesterol, and free fatty acids, and can form two coexisting crystalline lamellar phases: the long periodicity…

From the beginning of Galileo’s career, well before the publication of the Sidereus Nuncius, his contemporaries took pains to shape his reputation and fame. They were fully aware that their efforts would shape the course of his career; they also knew that they would profit from helping him.

The central question in this study is: ‘What can the Netherlands learn from the way in which these countries have organized law enforcement and the rule of law in their overseas territories?’

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

The Faculty of Science

Three Leiden astronomers have shown that some asteroids that are considered harmless for now, can collide with Earth in the future. They did their research with the help of an artificial neural network. The results have been accepted for publication in the journal Astronomy & Astrophysics.

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…

Throughout history, a large portion of the world's population has lived under imperial rule. Although scholars do not always agree on when and where the roots of imperialism lie, most would agree that imperial configurations have affected human history so profoundly that the legacy of ancient empires…

The Archaeology of Imperial Landscapes examines the transformation of rural landscapes and societies that formed the backbone of ancient empires in the Near East and Mediterranean. Through a comparative approach to archaeological data, it analyses the patterns of transformation in widely differing imperial…

Essays in Honour of Olivier P. Nieuwenhuyse

In comparing a selection of 18th-century histories to a representative sample of 19th-century histories of science, this project inquires: Which early modern vices persisted into the 19th century and to what extent were those vices embodied in anecdotes, conveyed through commonplaces, or symbolically…

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 Leiden University Institute for History has a wide-ranging academic scope unique for the Netherlands. This is directly reflected in the participation of her staff in various Master's and Bachelor's programmes at Leiden University.

Was the progressive colonial civil servant the precursor of the postcolonial development-aid worker?

Since the emergence of humankind people have maintained social contacts and traveled widely, establishing interaction networks in which goods are traded and ideas are transmitted, increasingly on a global scale.

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…

This volume sees the publication of fifty-six early Old Babylonian letters from ca. 1880 BCE. They were found by legendary Iraqi archaeologist Taha Baqir in 1941 at the site of Tell ed-Dēr, ancient Sippar-Amnānum, in central Iraq.

This thesis explores several aspects of these Early Old Babylonian Amorites.

Dr Madalina Busuioc has completed a study for the European Parliament titled

Sarah Giest and Annemarie Samuels, both Assistant Professors at Leiden University, researched the quality and coverage of the data being collected for policiymakers to be used, specifically pertaining to minority groups.

This article introduces the special issue on ‘Digital Activism’ by exploring some of the trends in social media activism and scholarship thereof. The authors ask to what extent this literature helps us understand Asian forms of online activism, which forms of activism have relatively done well, and…

In this article, Samuels elaborates the concept of narrative navigation to analyze the subjective and intersubjective ways in which people struggle through experiences of illness by constructing multiple, ambiguous and non-linear narratives that may continuously change, as they reposition themselves…

Yousef Sweid was called a ‘stinking Arab’ in the sandpit at his Jewish kindergarten in Haifa. In a packed lecture hall, the Palestinian-Israeli actor performed a powerful excerpt from his show ‘Between the River and the Sea’.

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

The aromatic infrared bands (AIBs) seen throughout the interstellar medium (ISM) are generally thought to be carried by polycyclic aromatic hydrocarbons (PAHs) and their nitrogen analogues (PANHs).

Although plant domestication has significantly altered crop genetics and phenotypes, its effects on the taxonomic and functional diversity of plant-associated microbiomes are not well understood.

The project ‘Between the Holy Land and the World’ proposes a connected history of the Christian communities in the Near East (1900-1948) by means of a study of unpublished Franciscan and Dominican photographic collections.

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 concept behind GraspOS is to build the European Federated Open Metrics Infrastructure in a decentralised way, where: different types of data come together to create metrics; tools and services are developed to improve EU or global infrastructures but are also shared with national or institutional…

Reconstructing Later Prehistoric Societies in Northern Iraq (ca. 7000-3000 BCE)