The solar system was formed approximately 4.56 billion years ago. Despite the numerous theories that have been developed over the years, the formation and evolution of the solar system still remain unclear.

Identifying the gaps in the legal framework for EU activities in the maritime security domain, and specifically in the areas of combating piracy, human smuggling or trafficking and drug trafficking.

Until the 1990s, the only known planets were those in our Solar System. Three decades later, several thousand exoplanets have been discovered orbiting stars other than the Sun, and substantial efforts have been made to explore these strange new worlds through spectroscopic analyses of their atmosphe…

On 3 November 2022, Mariëlle Bruning, Professor of Children and the Law, spoke as an expert on child protection at a roundtable discussion with Dutch Lower House members of the Standing Committee on Justice and Security.

About 15 km to the south of the ancient city of Petra, archaeologists from the University of Leiden have discovered an impressive network of ancient water conservation measures and irrigated field systems.

Knowledge and culture subproject 4:

Design of a Linguistic System for Interstellar Communication Based on Logic

In this thesis I describe the results of Pulsed Interleaved Excitation and Fluorescence (Cross) Correlation Spectroscopy (PIE-F(C)CS) combined with single-pair Förster Resonance Energy Transfer (spFRET) used to study dynamics in single nucleosomes, which depends on subtle differences in the length of…

Gold nanorods are biocompatible nanoparticles that present an excellent two-photon signal that can be used to get high spatial resolution inside living cells. Gold nanorods are photostable and therefore can be followed inside cells for long time, with possible applications as trackers in live cells.

On Thursday the 3rd of March 2016, Professor Bruning welcomed a delegation from the government of the Republic of Kosovo, within the framework of the Matra-project ‘Protecting Children in Kosovo: from Policy to Practice’.

With cancer, the immune system is a double-edged sword: it can attack tumour cells, but can also help them grow and spread. It is a question of harnessing it. This is what Professor Karin de Visser argued in her inaugural lecture on 15 November 2019.

Knowledge and culture subproject 2:

The research report by the independent committee on the future of the work disability system in the Netherlands ('Onafhankelijke Commissie Toekomst Arbeidsongeschiktheidsstelsel' (Octas)) was published this week. While the number of people unable to work has dropped considerably, the system is still…

Ben Wielstra studies balanced lethal systems, in which half of the offspring die before birth. In the journal Current Biology, he explains in an accessible way how such a disadvantage can originate in nature.

Currently, there is an outage that makes it impossible to login into some (educational) systems.

The European Research Council (ERC) has awarded a prestigious Starting Grant to Leiden archaeologist Dr Nathalie Brusgaard. With this €1.5 million grant, Brusgaard will investigate how the transition to farming in Western Europe affected the relationship between humans and wild animals. A theme that,…

At an international high-level conference, Valentina Carraro, Deputy Coordinator of the interdisciplinary programme Global Transformations and Governance Challenges (GTGC) presented her research on human rights in the UN Human Rights Council and Treaty body systems. One of the most practical recommendations…

A lot of municipalities work with a points system to encourage construction projects to take biodiversity and creating green areas into account. But this way of working also benefits local neighbourhoods and residents, master's student Marije Sesink discovered. She based her study on The Hague.

A new almost free childcare system may sound ideal, but it also comes with risks for parents. Psychologists from Leiden University and research firm D&B have concluded that the system can cause uncertainty and stress, particularly among vulnerable groups.

Linguist Sara Petrollino has written the first detailed grammar of Hamar, a language spoken in south-west Ethiopia that has some unique characteristics. PhD defence 10 November.

Course

In 2017, at the start of the Rutte III cabinet, tax scholars Leo Stevens and Koen Caminada presented a blueprint for a new tax system. Today, four years on, they observe that the cabinet has put little effort into innovations in the area of tax.

Ben Wielstra strives to unravel the evolution of balanced lethal systems. On 1 February he started his own lab at the Institute of Biology Leiden. Wielstra is one of five researchers at Leiden University who has been awarded an ERC Starting Grant in 2018 by the European Research Council. ERC Starting…

Environmental scientist Rutger Hoekstra addressed the General Assembly of the United Nations on 12 April. And that’s quite a big thing to do. How do you get there as a scientist? And, more importantly, what was his message? In eight questions, Rutger explains what he does and why.

LIACS organizes different lectures and seminars like the LCN2 Seminars and SAILS Lunch Time-seminars.

Planets existing in other solar systems contain invaluable information about the origin of planets and life. PhD candidate Yapeng Zhang has studied their atmospheres by looking at their smallest parts: isotopes. With her research she hopes to discover what makes our own solar system unique.

On 16-17 June 2022, Valentina Carraro presented a paper on ‘Overlapping Institutions in the United Nations human rights system’ at the Politicologenetmaal conference, Radboud University, Nijmegen.

Exceptional collaboration between physicians is needed to better understand and treat autoimmune diseases that cause inflammation in various organ systems.

This doctoral thesis comprises four studies on the content and structure of physics teachers’ belief systems about teaching and learning physics in secondary education in the Netherlands.

On 5 October, Katherine Filesia defended the thesis 'Speaking the same language: the introduction of the Anglo-American trust into the Dutch legal system'. The doctoral research was supervised by Pim Huijgen and Frans Sonneveldt.

Technologies that help to enhance our educational environments can be found everywhere.

Political scientists Tom van der Meer, Lisa Janssen (University of Amsterdam) and Tom Louwerse (Leiden University) analyse polls presented by the main polling agencies in the Netherlands, as well as micro-level panel data. They reach three main conclusions. First, vote intention polls in the Netherlands…

Promotor: G.R. de Snoo Co-promotor: C.J.M. Musters

Christian Lequesne introduces the upcoming special issue on Ministries of Foreign Affairs in this blog post.

All comets might share their place of birth, new research says. For the first time ever, astronomer Christian Eistrup applied chemical models to fourteen well-known comets, surprisingly finding a clear pattern. His publication has been accepted in the journal Astronomy & Astrophysics.

Promotores: Prof.dr. H. van Veen & Prof.dr. W. de Boer (Wageningen University)

On 25 January 2018, at 16:15 hrs, Yannick van den Brink will defend his doctoral thesis titled ‘Voorlopige hechtenis in het Nederlands jeugdstrafrecht’ (‘Pre-trial detention in the Dutch juvenile justice system’) at the Academy Building of Leiden University. The doctoral research is supervised by Professor…

In this Thesis, novel charge induction mechanisms of ionic liquids are treated, tested and experimented on complex oxides, in particular cuprates.

FIFA's new rules were introduced after the Diarra case in which a footballer wanted to unilaterally terminate his contract while it was still running. Stefaan Van den Bogaert, Professor of European Law, says in Dutch RTL news that he believes the new rules are ‘too restrictive’.

Joost Grootens contributes the introductory essay ‘Charles Joseph Minard: Critical Practice’ to the book ‘Le Système Minard’ on the French pioneer in the representation of statistical data in the 19th century.

Accurate prediction of the unbound drug concentration-time profile at the CNS target site is crucial for the assessment of the right drug concentration-effect relationship. PBPK models have supported the PK prediction of the CNS target sites and the translation of PK data between species and between…

Mechanical metamaterials are carefully engineered materials whose properties are controlled by their structure, not by their composition, which allows using metamaterials to study and control physical effects in detail⁠.

In the traditional theory of linear elasticity, superposition dictates that the response of a material does not depend on the sequence of the applied mechanical actuations.