Cat Paw Tweet Goes Viral

Almost 100 billion tons of CO₂ could be pulled out of the atmosphere by the end of the century. That is, if high-income countries switch to a plant-based diet. The double carbon profit of returning farmland to its natural state would equal about 14 years’ worth of agricultural emissions, researchers…

Open Science verandert de manier waarop onderzoek wordt gedeeld en wordt samengewerkt. Anna van ’t Veer won een award voor haar Open Science-activiteiten.

People can be easily mislead with graphs. But they don’t necessarily stay misled, the research shows.

Offshore wind farms host more soil animals per square meter than the North Sea floor, discovered Leiden researchers. After 25 years, hundred times more animals and a doubling of the number of different species could live on the foundations of wind turbines. The researchers published their findings in…

Interest group Animal Rights has started a test case to prompt the Netherlands Food and Consumer Product Safety Authority (NVWA) to tackle farmers who do not adequately protect their livestock against wolves. The test case concerns a rejected enforcement request to the NVWA. In it, the NVWA were called…

Auke-Florian Hiemstra is the Leidsch Dagblad Person of the Year 2022.

PhD candidates in medicine, Wouter Jan Geelhoed and Nan van Geloven, are the winners of the Leiden preliminary round of FameLab. They are through to the final on 22 April.

The International Reynard Society studies the role of animals in the European literature of the Middle Ages and its afterlife. It focuses especially on beast epics, fables, and fabliaux. The 24th international colloquium of the Society – Of Foxes and Fish: Interdisciplinary Approaches to Medieval Animal…

David van Bodegom, Professor of Vitality in an Ageing Population, will give his inaugural lecture on 11 November, also titled Vitality in an Ageing Population. According to Van Bodegom the key to healthy ageing is the lived environment. In the fight against lifestyle-related conditions, he therefore…

Two terrifying yellow eyes stared at eleven-year-old Francis Lesilau. In the evening light they changed colour: green, amber, back to yellow... The lion had just grabbed one of his camels and now turned to number two. For a moment Francis was nailed to the ground, then he ran towards the predator, screaming.…

Wouter Halfwerk (IBL) received a Veni grant from the Netherlands Organization for Scientific Research for his research project on the influence of man-made noise on foraging birds.

Children are often able to decide for themselves whether they want to take part in medical research. In order to be able to make an informed decision, they need clear information. PhD candidate Ronella Grootens set a good example and created a cartoon story. PhD defence 6 December.

It may well be that only male zebra finches can sing, but the females are faster at learning to discriminate sounds. Leiden researchers publish their findings in the scientific journal Animal Behaviour.

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…

Explaining your PhD research to others can be quite difficult, especially without talking! PhD student Annebelle Kok of the Institute of Biology Leiden was one of the finalists of the 'Dance Your PhD' competition of scientific journal Science. ‘You have to understand your own research well if you are…

Pastoralist Societies, Rock Art and Literacy in Jordan’s Black Desert (200 BC to 800 AD)

A study by an international group of scientists headed by Prof. Michael Richardson showed that asymmetry in the snake lungs manifests itself early in development.

On Monday 21 September Annemarie Meijer, Professor of Immunobiology, presented her inaugural lecture on immunobiology and infectious disease.

On Thursday October 30th Brendan Carroll successfully defended his PhD dissertation entitled:

‘Broad Implications of Climate Change in East Africa in terms of Human and Animal Futures’

To what extent are, can, and should, human trafficking and human smuggling be(ing) seen as interlinked phenomena? What are the consequences of seeing the phenomena as either distinct or interlinked for the way in which migrants crossing intra-Schengen borders are treated.

Which young researchers were best at explaining their research to a general audience? Twelve researchers battled it out at the FameLab heat on 7 March. The two winners go through to the national final.

The d12n Research Cluster provides a space for inquiry and intervention into the ongoing digit(al)isation of culture, society, and scholarship. The research cluster aims to link CADS Institute researchers to each other as well as to experts and praticioners from around the world as we combine thinking…

Let’s get this out of the way: Hillary Clinton won the 26 September 2016 presidential candidates television debate. Handily.

National Meat Free Week (Nationale Week Zonder Vlees, 7–13 March) is an initiative to reduce meat consumption. Assistant professor Paul Behrens is studying what impact a change in our food consumption would have on the world. What, according to him, are the main reasons to switch to a (mainly) plant-based…

Plant communities consisting of many different species are less vulnerable to attacks of plant eating animals or diseases than less diverse communities. It also helps if plant species in one community are not closely related to each other. That is the outcome of an international study published in Nature…

The major aim is to examine the potential of learning the body to produce a similar physiological (autonomic, neuroendocrine, or immune) and physical (e.g., desensitization of persistent physical symptoms) response to placebo medication than to active medication (pharmacological conditioning). If proven…

Dirk Huyge (Director) & Wouter Claes (Vice-Director)

This project investigates the causes of the major archaeological change in the period of 40.000-20.000 BC in South Africa.

Crises like climate change and loss of biodiversity threaten our planet. That’s why sustainability is an important topic in research and education across Leiden University. On this website you read how scientists from many disciplines work together in researching sustainability.

Our lectures are open to anyone with an interest Find your inspiration for interdisciplinary research

‘Our health is the area that stands to gain most from artificial intelligence.’ The three universities in Zuid-Holland are helping make these gains. Three researchers talk about their collaborative research into AI for health, drug discovery and healthcare in the AI knowledge cluster in Zuid-Holland.…

Microplastics are everywhere: in the ocean, in cooking salt and even in animals. Should that worry us? 'Yes,' said environmental scientist Thijs Bosker during a pop-up lecture in The Hague on 8 September. ‘We really need to do something now, not wait until it becomes an even bigger problem.’

For the first time, researchers were able to grow organoids from snake venom glands. The lab-grown 3-D structures can produce snake venom molecules. This is a major step in finding treatments to tackle snakebite, which causes over 100,000 deaths each year. Publication in top journal Cell.

The rare Ethiopian wolf is increasingly coming into contact with local cattle farmers. PhD candidate Girma Eshete explored ways of saving this elegant animal from being wiped out. Phd-defense on 5 September.

An international research consortium led by Bob van de Water, Professor of Toxicology at Leiden University, has been awarded a prestigious Horizon2020 grant of 30 million euros.

The book 'Darwin comes to town’ by Menno Schilthuizen has been awarded the best nature book in the Netherlands. The Leiden biologist received the Jan Wolkers Prize, awarded annually by Dutch TV and radio show 'Vroege Vogels'. In his book Schilthuizen describes evolution in one of the newest and most…

Annemarie Meijer is appointed full Professor of Immunobiology. Meijer’s research focuses on immunobiology and infectious disease. She uses the zebrafish as a model for understanding mechanisms of host immune defense against intracellular bacterial pathogens.

An international team from the Netherlands, France, Norway and Austria demonstrate how new sequencing technologies can be used to efficiently generate the genome, DNA, sequence of an endangered animal, the European Eel.

Maurijn van der Zee, at the IBL since 2010, investigates how genetic changes in developmental programs lead to new animal forms in evolution, using insects as model system. His field of research is called evolutionary developmental biology. Currently, he is working on the success and diversity of the…

The world is becoming clogged with plastic, with tiny plastic particles found everywhere, from the oceans’ depths to the mountain tops, soil, plants, animals and even inside us. The question is: what harm, if any, are they causing? In a new article on The Conversation, environmental scientists Meiru…

Leiden biotech company In Ovo, a spin-off of Leiden University, has received a European Innovation Council Accelerator Pilot Grant. In Ovo will use this 2.5-million-euro grant in its mission to stop the culling of male chicks.

Seminar

The European Rule of Law Conference 2025, hosted by re:constitution at the Berlin Social Science Center (15-16 September), brought together scholars, practitioners, and civil society to critically examine the challenges facing democracy and the rule of law in Europe and to explore ways of shaping their…