Even when a border has officially disappeared, it is still people who decide whether others may cross freely. This was also true for the Polish-German border, where PhD candidate Maryla Klajn spend six months conducting fieldwork.

What does it actually mean to have a “human in the loop” when an AI system makes decisions about people’s lives? And is human oversight enough to prevent things from going wrong?

On 13 May 2025, Melanie Fink presented her latest research on the role of the duty to reason and other explanation rights to safeguard human dignity in the automated state at the AI & Law Summer School hosted by the University of Tübingen.

Houben and Ten Oever investigate the relationship between public service obligations in EU law (PSOs) and human rights. PSOs served mainly as a correction to free market forces and did not originate from a human rights perspective.

Researchers from the Plant Ecology and Phytochemistry group at the Institute of Biology Leiden (IBL) received an STW (Stichting Technologische Wetenschappen) grant for applied studies in plant herbivore resistance with potential for a novel resistance test.

Leiden chemists recreated the bacterial capsule of meningococcus in the lab. With a few modifications, these capsules can serve as an extra safe and effective vaccine against these notorious bacteria, which can cause, for example, meningitis. PhD candidate Jacopo Enotarpi and his team published the…

The NYU Abu Dhabi Humanities Research Fellowship for the Study of the Arab World (HRF) invites early-career scholars who wish to contribute to the vibrant research culture of NYUAD’s Saadiyat campus to apply for a residential postdoctoral fellowship, starting September 2026.

As part of the NEXUS1492 project, this project will use ancient DNA techniques to shed new light on the demographic and health history of the Caribbean and the impact of European colonization on indigenous communities in the region.

The infectious diseases malaria and tuberculosis are responsible for 2.1 million deaths every year. Leiden researchers are currently testing a new tuberculosis vaccine.

The genomic DNA of every organism is organized and compacted in order to fit inside the cell. This is achieved by the joint action of numerous architectural proteins that aid in folding the genome. Genome folding is tightly interconnected with transcription, with genes in certain regions being silenced,…

The research in the Biosyn group is focused on the design, synthesis and function of the four major types of biomolecules: nucleic acids, carbohydrates, peptides and lipids and hybrid structures thereof. These biomolecules and their derivatives are used in drug discovery and chemical biology, to develop…

Vaccines are an extraordinary category of biopharmaceuticals. They are usually prophylactic and come in many types, from whole bacteria to peptides and nucleic acids. They are very cost effective and almost every human on the planet is vaccinated. The latter mandates that vaccines have to be extremely…

An overview of awards and prizes granted to our staff and students in 2022, as well as special appointments at Leiden University and other institutions.

The Chemical Probe Facility is part of the Leiden Early Drug Discovery & Development (LED3) center. Activity-based protein profiling (ABPP) is one of the pillars of chemical biology. ABPP determines the activity of entire protein families in living cells and tissues under physiological conditions, such…

The goal of hit and lead optimization is to optimize suitable chemical starting points that can modulate a drug target. The methods and technologies used are similar to those in Hit Discovery, but once the compound has shown activity in an animal model, it moves from 'hit' to 'lead.'

On 27 and 28 April, Simona Demková participated as a panelist at the conference 'A

It is a familiar phenomenon: you ask the assistant on your phone to call your mother, but it calls a friend instead. Tom Kouwenhoven, PhD student in the SAILS programme, investigates how humans and Artificial Intelligence (AI) can better communicate with each other, so that these kinds of situations…

In Spring 2023, Simona Demková and Daniel Mândrescu from the Europa Institute secured the new Leiden University Starting Grant, valued at EUR 240,000, for a collaborative project: ‘The EU’s Human-Centred Digital Transformation.’

Can smart suggestions help translators work better with machine translation? As machine translation becomes the norm, professional translators are asked to correct its output; a process called post-editing. But how can we make this easier and more effective?

Drawing on a broad array of sources, this project examines modern retrievals of Bacon’s idols, thereby testing Justus von Liebig’s intriguing observation, back in 1863, that Bacon’s name lived on mainly in mottos or stereotypical phrases. More importantly, it examines the rhetorical purposes served…

The goal of the MODOMA-project is to create a computer model of language acquisition.

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…

This project analyzes to what extent hodegetical textbooks relied on each other in warning their readers against vicious habits, how much continuity their catalogs of vice displayed, and to what extent vices that persisted throughout the 18th and 19th centuries were associated with easy-to-remember…

What evaluative languages (errors, mistakes, vices, etc.) did book reviewers employ? To what extent and on what occasions did they invoke early modern vices? And to what extent did this differ across fields or change over the course of the century?

An in-depth history of Large Language Models—and what their ubiquity, disruption, and creativity mean from a wider sociopolitical perspective.

Ariane Briegel has been appointed Professor in the fìeld of Ultrastructural Biology within the Faculty of Science at the Institute of Biology from the 1st of December 2015. Her expertise is in using electron cryotomography to study how microbes sense and respond to their environment.

Amanda gave a talk in Vienna on the role of plant foods in human evolution, including a small teaser of the FoodWays project!

The lecture series

Dr. Katharine MacDonald (Faculty of Archaeology) sketches the background to a recent paper in Science Advances, co-authored by her and other members of the Liveable Planet team.

Canadian Roméo Dallaire (1946) was UN Commander in Rwanda at the time of the genocide there, subsequently becoming a champion of human rights. He has worked as a researcher at several different universities, and was a senator in Canada for nine years. Dallaire will give this year's Cleveringa lecture…

Leiden University is announcing its approach to sensitive collaboration with external partners.

The Saxo Institute, Faculty of Humanities, University of Copenhagen (UCPH) invites applicants for a tenure-track assistant professorship in economic history

An international team of researchers, involving members from the ERC Synergy project NEXUS 1492 based at the Leiden University, the Universities of Oklahoma, Copenhagen and York reveal challenges when studying ancient microbiomes in a recent issue of Scientific Reports.

The Collective Experience of Empathic Data Systems (CEEDs) consortium developed novel integrated technologies that support experiencing, analysing and understanding of very large datasets.

This project tries to explain the persistence of this cultural repertoire by zooming in on (1) interaction between idioms (cultural repertoires) available to scholars at certain points in time, (2) mechanisms that help transmit repertoires across time and place, and (3) rhetorical purposes for which…

This book presents a new framework for regulating human-like machines designed for emotional and sexual engagement, often powered by AI.

On 3 July, students of the Leiden Leadership Programme received their certificates in the Marekerk church in Leiden. During the festive closing ceremony, it became clear that humanity and leadership go hand in hand. ‘As a leader, you have to listen, observe and acknowledge problems.’

This project traces how, why, and under what circumstances scholars invoked the trope of “dogmatism,” especially in controversies. Relevant controversies from various fields, periods, and countries will be subjected to in-depth rhetorical analysis.