Leiden physicists exploit self-assembly of small particles to someday create functional structures such as micro-robots from the bottom up. They have now taken an important step forward by experimentally realizing joints at micrometer scale. Publication in Nanoscale.

The Kenyan second-hand clothing market is depended upon locally by citizens for its low cost, high quality and diversity. To prevent the spread of the coronavirus, Kenya halted imports of second-hand clothes in late March. Ever since, local manufacturers and designers are looking for solutions and opportunities…

Tropical butterflies adapt to their environment to improve their chances of survival. The changes are triggered by hormone signals that transmit information about temperature to the butterflies' tissues. Biologist Ana Rita Mateus shows how a complex combination of environment, physiology and genetics…

Just one year ago, nobody would have given Trump a cat's chance in the US presidential elections. Now he will be the next President of the United States. Professor of Journalism and New Media Jaap de Jong explains the rhetoric that has got Trump so far.

After receiving positive feedback from peers, socially anxious young people feel as confident about themselves as their non-anxious counterparts. 'These young people are then able to handle new social situations more confidently,’ says Leiden psychologist Anne Miers. Her research is published in the…

How dangerous are micro- and nanoplastics? Do they affect the environment? What harm can they do to our bodies? Questions that we can now finally answer because of Fazel Abdolahpur Monikh. Together with his colleagues, he developed a method to detect and quantify nano-sized plastics. Their paper has…

Leiden Observatory is going to use a new technique to carry out calculations on gravitational lensing measurements. They will do this is the context of research into the formation of elliptical galaxies. Alessandro Sonnenfeld (University of Tokyo) who developed this technique joined the research team…

Call for Participation for the online workshop Interrogating Speculative Futures: A workshop on the politics of imagining a future with(out) chronic illness on 19 and 20 July 2021.

On Wednesday 26 June, Marieke Liem, Associate Professor Physical Violence and Public Order at Leiden University’s Institute of Security and Global Affairs (ISGA), appeared on both Dutch radio programme ‘Nieuws & CO’ and the eight o’clock television news (NOS) to discuss life imprisonment.

Astronomers at ASTRON and Leiden University have used the LOFAR radio telescope to discover a 'brown dwarf' – a faint object more massive than Jupiter, but significantly less massive than the Sun. The discovery of the object dubbed Elegast, opens up a new path that uses radio telescopes to discover…

Undesirable associations with sex can be unlearned, but return if the circumstances change. They must therefore be unlearned in different situations. The drug D-cycloserine may help here. These are the findings of psychologist Mirte Brom.

North Korean labourers are still being forced to work in the European Union. According to researchers, including Professor of Korean Studies Remco Breuker at Leiden University, Dutch companies are buying ships from a dockyard that uses North Korean workers.

The new MASCARA-facilty in Chile has achieved first light. This new facility will seek out transiting exoplanets as they pass in front of their bright parent stars and create a catalogue of targets for future exoplanet characterisation observations.

Young transgender people are able to decide together with their parents on a reversible intervention with puberty blockers. These are the results of a study by LUMC Curium and Amsterdam UMC of 74 young people undergoing treatment. Ninety percent of the young people studied proved able to make an informed…

The European Union has invested ten million euros in the so-called iNEXT-Discovery consortium. The goal of this new consortium is to enable European researchers to extend innovative structural biology research. The Netherlands Centre for Electron Nanoscopy (NeCEN) is also part of iNEXT-Disovery, which…

The Leiden iGEM team has won the grand prize at the iGEM international biology competition. The students won a further five prizes, including those for best diagnostics tracks and best inclusion. ‘We still can’t believe it. It feels almost surreal,’ team member Amber Schonk said yesterday to University…

People are more likely to cooperate with their compatriots than with people from other countries. This tendency can frustrate collaborative projects, such as cross-border cooperation for the provision of public goods. This is the conclusion of Leiden social psychologist Angelo Romano.

Birds around airports are more aggressive and sing as if they have hearing loss. Collaboration between researchers of Manchester Metropolitan University and the Institute of Biology Leiden has led to surprising new findings about the impact of anthropogenic noise on birds around airports. Publication…

One of the speakers at the Diversity symposium on 22 November is Estela Mara Bensimon, highly honoured professor of Higher Education in the US. A second speaker is Peter Slort, from the Dutch National Police, responsible for Diversity. He will talk about how diversity is progressing within the police…

Olivier Nieuwenhuyse, member of the Faculty of Archaeology, was successful in receiving a grant from the Bijvanck Foundation for a first campaign of work at Tell Begum, northern Iraq (Iraqi Kurdistan). A small international team directed by Olivier Nieuwenhuyse in a joint effort with the Directorate…

Density functional theory (DFT) with so-called semi-local exchange has been remarkable accurate for some dissociative chemisorption reactions on metals, but it has notoriously failed for others. A team of researchers from the University of California at Irvine and the Leiden Institute of Chemistry have…

Scientists are asking your help to find the origin of hundreds of thousands of galaxies that have been discovered by the largest radio telescope ever built: LOFAR. Where do these mysterious objects, which extend for thousands of light-years, come from? A new citizen science project called LOFAR Radio…

The steady decline in lethal gun violence in the EU came to halt in 2012 and some countries, such as Sweden, have even noticed an increase since then. An arms race among drug criminals and an increase in the availability of illegal firearms could lead to more criminal and gun violence. This is one of…

Itandehui Jansen graduated from the Netherlands Film and Television Academy in Amsterdam and is currently making films as part of her PhD project at Leiden University. And with great success. Her films have been shown at the IDFA and the Short Film Corner of Cannes, and have won a number of prizes.…

The documentary invites us to consider the question of what we consider valuable knowledge. “We need to realise that doing and thinking are intertwined in ways we did not comprehend before” argues Maikel Kuijpers, archaeologist and the producer of the documentary. “This will have consequences for the…

The present market regulations make it extremely risky to invest in green energy, and this is impeding the fight against climate change. This is what Oscar Kraan writes in his dissertation. PhD defence on 25 April.

Together with a large international team of scientists, researchers Peter van Bodegom and Nadia Soudzilovskaia of the Leiden Institute of Environmental Sciences (CML) have created maps of variability in plant trait distribution across the globe. The new maps have been published in Proceedings of the…

Molecules are extremely hard to see in visible light, especially without using fluorescence. Leiden physicists have now made their optical technique sensitive enough to image the molecules of their interest in all sizes. Publication in Nanoletters.

The latest research from the Leiden outdoor laboratory ‘Living Lab’ shows that the insecticide thiacloprid strongly influences even the most common and robust dragonfly species in the Netherlands. The study was published in the Journal of Applied Ecology.

Leiden PhD student Xuequan Zhou has designed a new promising molecule that efficiently kills cancer cells, but does not harm healthy tissue. The trick: the drug is only active when irradiated with light. Zhou’s new compound does this extra efficiently by cleverly self-organising into nanoparticles.…

IBL-researcher Phil Elks in the group of Annemarie Meijer won the Cell Observatory Publication of the Year 2013. He received the award for his paper in PLoS Pathogens, showing that activation of hypoxia signaling protects against mycobacterial infection.

The price of products and services plays an enormous role in society, and therefore also in the legal domain, according to Professor of Business Studies. Inaugural lecture 2 June.

Stars orbit black holes while jumping up and down. This is the prediction of a theoretical model developed by Leiden physicist Satish Kumar Saravanan, based on Einstein’s theory of relativity. He defends his PhD thesis on July 7th.

Higher temperatures are resulting in changes to vegetation and soil in mountain areas throughout the world. An international research team including Leiden ecologist Ellen Cieraad published an article on 25 January in Nature on the disruption to the ecosystem.

Population growth, economic expansion and the associated land use caused an increase in the number of bird species facing extinction and a reduction in carbon storage worldwide. These are the findings of an international team of scientists, also from the Leiden University Institute of Environmental…

Spend an hour on any social media canal (Facebook, Twitter, you name it) and you will find opinions and frustration. Frustration about asylum seeker shelters being built in local villages; frustration about trade negotiations with the US, Ukraine or any other country; and thousands of opinions about…

An international group of scientists, led by Leiden physicist Sense Jan van der Molen, has developed the first switchable molecular diode. You can turn this on and off through humidity. Vice versa, it is a humidity sensor at the nanoscale. Publication on 4 December in Nature Nanotechnology.

Using photosynthesis to generate energy, or using enzymes to effectively produce biofuel; Leiden chemists Huub de Groot en Hermen Overkleeft have both obtained an NWO TOP funding for their pioneering research. With the money they can take on new PhD students.

On Friday October 31st 2014 the fourth annual Jan Reedijk LIC Symposium will be held. The main lectures of the day will be

The KM3NeT neutrino detector celebrates the installation of the first string of detectors in the Mediterranean Sea off the French coast. It will measure neutrinos’ spooky spontaneous change in flavor. Leiden physicist Dorothea Samtleben is closely involved in the project.

In the eighties the Umhlatuzana rock shelter in Kwa-Zulu Natal, South Africa, was excavated. Results from this excavation led to an understanding when the Later Stone Age started in this area. This archaeological period is often associated with the structural presence of modern human behavior. Now a…

On Thursday 9 November, Leiden University organized its annual Physics Ladies Day for female high school students. To mark this festive day, we put the spotlight on two female researchers, who talk about their experiences in physics.

On 21 March The Netherlands Centre for Electron Nanoscopy (NeCEN) hosted the Life Sciences Café. Around 60 people from neighbour companies from the Leiden BioScience Park visited the facility for cryo-electron microscopy to get a glimpse behind the scenes. Head of NeCEN Ludo Renault believes it was…

Neanderthals used careful techniques to hunt their prey at close range. This is the conclusion of an international team of archaeologists, including researchers, in the journal Nature Ecology and Evolution. Publication 25 June.

On Monday 22 November 2021, the Municipality of Leiden, Leiden Law School and the Legal Advice Centre in Leiden signed a collaboration agreement. The parties agreed that at the request of the Municipality, the Law School will help train students to better equip them in their work on the Rental Team…

The extension of the Dutch government’s Covid-19 relief measures for businesses has ensured that in the last six months of 2020 the number of bankruptcies was at an all-time low. However, according to the Bijzonder Beheer Barometer (special risk management barometer) an initiative of PwC and the Department…

The life of a fibroblast is heavy, but PhD student Julia Eckert makes it 19.5 times heavier, using the Large Diameter Centrifuge at the ESTEC space research centre in Noordwijk.

Isabel van Vledder and Dieuwertje van der Vlugt, 2 astronomy students from Leiden University, have mapped the entire Milky Way galaxy in dwarf stars for the first time. This result is the most comprehensive model ever for the distribution of these stars. The findings appear in a new paper in Monthly…

The number of victims of child abuse is estimated to be higher during the first lockdown compared with a period without a lockdown. This is mainly due to an increase in the number of victims of emotional neglect, including educational neglect and witnessing domestic abuse. Families with children about…

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