When focussing attention, the neurotransmitters noradrenaline and acetylcholine play an important role. This new finding made by psychologist Stephen Brown provides clues for further research on how focussed attention comes about. Dissertation defence on 16 June.

An international team of astronomers, including Professor Koen Kuijken, has published a series of online articles presenting the first results of a major search for dark matter. Never before have researchers been able to chart so precisely the characteristics of groups of galaxies and their dark matter.…

Bacteria and fungi on organic dairy farms are significantly different from those on conventional farms. That was discovered by postdoc researcher Sofia Gomes and her supervisors Nadia Soudzilovskaia and Peter van Bodegom in collaboration with the Louis Bolk Institute and Naturalis Biodiversity Centre.…

De Universiteit Leiden is al 25 jaar stevig geworteld in Den Haag. Dat werd zichtbaar tijdens de feestelijke bijeenkomst rondom de foto-expositie Universiteit Leiden in Den Haag: Onderzoekers van de stad.

The financial system needs complexity theory to predict economic crises like the 2008 meltdown. An international team of scientists, including Leiden physicist Diego Garlaschelli, state this in a paper published in Science on February 19th.

Some sectors have been hard hit by the pandemic, whereas others have grown. Yet there was no influx of workers from shrinking to growing sectors. This is the conclusion of research by economists from Leiden University. They published their results in the journal Economisch Statistische Berichten.

A series of upcoming activities by docARTES researchers Niels Berentsen, Bobby Mitchell, Shaya Feldman, and PhDArts researchers Jonas Staal, Riccardo Giacconi, Yota Ioannidou, and Brigitte Kovacs

Thanks to fanatical lobbying various groups of citizens and traders had a lot of influence on the initial success of the Dutch colony in Brazil. This is the conclusion of Leiden PhD candidate Joris van den Tol, who defended his thesis on 20 March.

Amid rising polarisation and discrimination, lawyer and human rights activist Lilian Gonçalves-Ho Kang You wants to show in her Cleveringa Lecture on 26 November how dangerous exclusion is.

Astronomer Joseph Callingham and his team have observed for the first time a clear signal from a giant burst from a star outside our solar system. This would have a devastating impact on any unfortunate planet orbiting the star.

Soil salinity is affecting large areas in the world and millions of farmers are faced with decreasing yields and many are even forced to migrate . Dutch scientists (Prof Dr. Gerrit van Straten (Wageningen University), Prof. Dr. Peter van Bodegom (Leiden University), Prof. Dr. Jelte Rozema (VU University…

On Sunday 29 October the annual open day of the Old Observatory will take place. During this day, people can visit the Old Observatory for free and enjoy the historic building.

More efficient use of phosphorus fertilisers would make it possible to meet food demand in 2050, without using more of the world’s land for agriculture. This is what environmental scientists José Mogollón and colleagues have discovered by working out various future scenarios for food production and…

A discovery made in Leiden helps not only to make natural gas from CO2 but also to store renewable energy. Research by Professor Marc Koper and PhD student Jing Shen shows how this process can be implemented in a cost-effective and controllable way. Nature Communications, 2 september 2015.

The scientific world is under increasing pressure from all directions: the money that society invests has to show clear returns. ‘The best thing we can do is to go along with this development,' says Ivo de Nooijer, Director of Luris, Leiden University's valorisation institute.

Young Leiden researchers Alisa van de Haar and Marleen Kunneman have received a KNAW Early Career Award. The prize, awarded annually for outstanding achievements, consists of 15,000 euros and a unique work of art.

Latin America matters! With its rich history, culture, its impressive resilience and creative innovation in the face of such a diverse array of challenges, Latin America can indeed show the way forward inspiring for positive change. Working together with Latin American institutions, our researchers…

The book ‘The Best of Times, The Worst of Times: Futures from the Frontiers of Climate Science’ by Paul Behrens has been launched in the US, a year after its original release in Europe. In his book, Behrens describes both hopeful and pessimistic scenarios for our planet.

The documentary Einstein’s Light by director Nickolas Barris shows in a dazzling manner what scientific breakthroughs resulted from the special friendship between Albert Einstein and the Leiden physicist Hendrik Antoon Lorentz. The documentary premiered at the Leiden International Film Festival on 2…

We asked a lot of everyone last year. The Personnel Monitor showed that the workload was high in 2022 and Covid took its toll. I therefore think everyone deserves some downtime. Time away from the daily grind.

A world-famous light experiment from 1801 has now been carried out with sound for the first time. Research by physicists in Leiden has produced new insights that could be applied in 5G devices and the emerging field of quantum acoustics.

It is theoretically possible that habitable planets exist around pulsars, rotating neutron stars. Such planets must have an enormous atmosphere that convert the deadly X-rays and high energy particles of the pulsar into heat. That is stated in a scientific paper by astronomers Alessandro Patruno and…

Can you prove whether a large quantum system truly behaves according to the weird and wonderful rules of quantum mechanics — or if it just looks like it does? In a groundbreaking study, physicists from Leiden, Beijing en Hangzhou found the answer to this question.

Researchers at Leiden University Medical Center (LUMC) and Radboud university medical center have been given the green light to deliberately infect volunteers with malaria in order to test a highly promising vaccine on them.

Dutch researchers have developed a new tool to label DNA for studying chromosomes in live cells. The tool is non-invasive and can be applied in culture but also in living organisms, such as zebrafish embryos. The team published their findings in the journal Nucleic Acids Research.

Novel language learning activates different neural processes than was previously thought. A Leiden research team has discovered parallel but separate contributions from the hippocampus and Broca's area, the learning centre in the left hemisphere. The right hemisphere of the brain also seems to play…

Asexual procreation in female wasps leads to an accumulation of genetic mutations, and the shrivelling of their sex organ. Leiden biologist Ken Kraaijeveld published this discovery in Evolution. His research is one of the first experimental studies into the consequences of asexual procreation.

The Sustainability Monitor 2023 shows that Leiden University is taking its sustainability efforts seriously.

On 9 March 2023, the Council for the Judiciary organized a conference on innovations within the judiciary, which took place in the building of the Dutch Supreme Court. The central conference theme was judicial innovation and what we can learn from various forms of socially effective justice (‘maatschappelijk…

If you know a crime is about to occur, should you be able to prevent it before it has even happened? This was one of the questions that was posed in light of predictive policing as a form of mass surveillance during the debate in the elective Governance of Crime and Social Disorder class of the Crisis…

Sixth-grade students with lower mathematical ability perform better on complex arithmetic problems if they write down their calculations. This discovery was made by psychologist Marije Fagginger Auer, a specialist in Methodology and Statistics. Her outlook is optimistic: ‘After training, these students…

That a parrot can copycat sounds is nothing new. But vocal learning is not common in animals. Researcher Carel ten Cate of the Institute of Biology Leiden (IBL) of Leiden University has now discovered a duck species that can imitate sounds. ‘It started with an obscure reference about an Australian musk…

Nanoplastics influence the behaviour of larval zebrafish, says new research by the Institute of Biology Leiden (IBL) and the Institute of Environmental Sciences (CML). The researchers observed that a certain type of nanoparticles leads to stress reactions in the sugar balance, resulting in hyperactivity…

Erik Kwakkel, researcher at the Faculty of Humanities, has found an extraordinary manuscript in the University Library’s extensive collection of medieval books. The book in question dates back to the first half of the eleventh century and is made entirely out of waste left over from the production of…

How do democracies develop? The Institute for History is devoting a three-day conference to this question.

They have known each other since they were small but Rianne and Tom first fell in love when working together at the university. That love culminated in a fairytale wedding amid all the revelry last 3 October.

If Europeans eat less meat and dairy, this will have major consequences for farmers. New research shows that many barns and machines could lose their value. With the right policies, these losses can be limited. This is shown by research from Leiden, Oxford and Vienna.

The European University for Well-Being is organising a hackathon from 14 to 21 September to generate concrete proposals for this virtual university and to create a EUniWell identity. Leiden students and staff are welcome to take part.

Around 15% of all Dutch people say they can't distinguish between left and right. People taking their driving test regularly take wrong turns and arguments flare up because that all-important turn is missed on the way to the camp site. Researchers in Leiden and Utrecht are trying to find out what's…

On 2 December, the Municipality of Leiden will apologise for the role previous administrations played in colonialism and slavery. A further study will be carried out.

Since the end of the nineteenth century Arabic book designers have influenced the social and cultural situation in the Middle East with their work. Huda Smitshuijzen Abi-Farès has written the first global overview of this neglected field of science. PhD defence 10 January.

After 41 years, Meindert Danhof, Professor of Pharmacology, is leaving the Leiden Academic Centre for Drug Research on 31 March. A symposium in his honour, prior to his farewell lecture, will show what has been achieved in this period. Danhof takes a look back on his career.

He is said to be one of the greatest living statisticians. Bradley Efron gave a lecture in Marekerk and opened LUXs, the Leiden University Center for Statistical Science, the first university statistics centre in the Netherlands.

Nitrogen deposition does not only affect plant biodiversity, but also strongly affects the composition of the remainder of the food web, through the changes in plant composition. In an unprecedented analysis of population changes of butterfly and moth species, an international research team including…

When do we say violence was used in an incident? The answer may seem obvious at first. But interim results from a study by Jolien van Breen show that Dutch people are labelling events in increasingly broad contexts as violent.

Researchers from the Leiden Institute of Chemistry show proof of principle that live-cell structural changes and metabolic processes can be followed in real time with NMR spectroscopy. They performed their study on photosynthetic green algae that are metabolically flexible and can sustain energy generation…

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…

To mark the university’s 450th anniversary, the Leiden Discoveries science route has been updated and was relaunched on the Night of Discoveries. New signs in town and a revamped website tell Leiden residents and visitors the stories of the city’s spectacular discoveries.

From indigenous space to colonial setting. Archaeological investigations at El Chorro de Maita in Cuba wins prestigious prize.