The disappearance and reappearance of species of plants in the Netherlands is a normal phenomenon. In the period from 1981-2000 the number of plants to have disappeared was considerably lower than previously, whereas the number of species rediscovered is much higher. Climate change may be the cause.

Should we be deeply concerned about the America of Donald Trump? Or will he bring about positive change? This was the main topic of discussion between researchers and students at the Big Leiden Presidential Breakfast on 9 November.

On Wednesday 13 December, Melanie Fink will defend her doctoral thesis ‘Frontex and Human Rights: Responsibility in “Multi-Actor Situations” under the ECHR and EU Public Liability Law’. The defence will take place at 10.00 hrs at the Academy Building of Leiden University, Rapenburg 73. The supervisors…

What if I completely changed everything? A subject without lectures or exams, where the right answer is not important and where students work with their hands. With this idea, Michiel Brentjens reformed the course Radioastronomy. His students are so enthusiastic about this approach that they nominated…

Just about everything that's known about Charles Darwin has already been said or written. Even so, Norbert Peeters – together with Tessa van Dijk – has managed to write an original book about the great English scholar. In the run-up to Darwin Day (12 February) he tells us about his new book.

Practical advice, a panel discussion, and an informal networking reception: students and alumni from the MA International Relations can look back on yet another successful event last April. The diverse backgrounds and careers of the alumni vividly illustrated the range of opportunities awaiting students…

The war in Ukraine is leading not only to human suffering. Ukraine's cultural heritage is also experiencing the consequences of the war: museums are being bombed and 'Russification' in the occupied territories means children no longer learn Ukrainian. Researcher Evelien Campfens was commissioned by…

It does not happen very often that a research project for a second-year bachelor's course gets turned into a proper academic paper. But International Studies students Pia Kurz, Coleen Gonner and Monika Bartnicka did just that. How did they manage it?

On 10 February Leiden University celebrated the official opening of Wijnhaven, the University's newest premises in The Hague. Everyone present emphasised the added value of a modern location in the heart of the city.

Boys who are bullied develop more fear and shame; boys who bully develop more anger and less guilt, which makes it easier to justify more bullying. Boys with autism respond more angrily to bullying than others, and thus make for an easier target. Developmental psychologist Carolien Rieffe and her colleagues…

Experience for yourself what studying is like, or explore the city where you will be attending lectures. On Saturday 11 February, future students came to an Experience Day in The Hague. School pupils, students and parents were welcome to attend lectures and tutorials throughout the day.

Criminology students Simone Kruijt and Noor Hekker conducted research into cybercrime in Leiden and presented their findings to the regional police and an enthusiastic Mayor Lenferink. The conclusions call for a new approach, said Lenferink.

A team of researchers from Young Academy and the Huygens ING/NL Lab has brought a three-century-old fragrance to life based on a recipe by Constantijn Huygens. The fragrance makes the past more tangible and can help people experience history differently.

We know we should do it, and we often want to, but… Why is it so hard to live a healthier life? Professor of Behavioural Interventions in Population Health Marieke Adriaanse explains.

With interactive live presentations, a mass of chat opportunities and 360 degree videos, more prospective students than ever can gain a good impression of their chosen programme and the city they’re thinking of studying at. Instead of meeting up in the Pieterskerk or faculty buildings, thousands of…

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…

Both Leon Jacobse and Thom Hersbach from Marc Koper's research group obtained their PhDs cum laude. They both investigated changes on the surface of a platinum electrode. Jacobse studied this at a positive voltage, Hersbach at a negative voltage. Platinum has the potential to convert renewable energy…

Historian Marjan Schwegman is the new Cleveringa Professor. Her lecture on 27 November will focus on Eduard Meijers, the Jewish professor who was dismissed by the Nazis. Schwegman's previous posts include Director of the NIOD Institute for War, Holocaust and Genocide Studies.

With his clever measuring methods Ignas Snellen – together with his team – was the first to detect carbon monoxide in the atmosphere of exoplanets. For his pioneering work the Leiden astrophysicist has been awarded the Spinoza Prize, the highest academic honour in the Netherlands. The prize of 2.5 million…

All the world leaders have had to choose an approach during the global Covid-19 crisis. But which approach is the most effective? André Gerrits, Professor of International Studies & Global Politics, who lectures in the BA International Studies, is observing some interesting developments. ‘Democracies…

Leiden Professor of Maths Frans van Schooten Jnr. (1615-1660) and his wife Margrieta were painted by Rembrandt. This is the claim made by mathematician and art historian Johan Zwakenberg in his recently published article in the 2018 Leiden Yearbook. Leiden art historians are not completely convinced…

If a forged Vermeer or Rembrandt is discovered, it is world news. Yet tracing fakes has long been a low priority in art history. University lecturer Anna Tummers will receive an ERC grant of almost two million euros to change that.

A special find has been made in the Alkmaar Regional Archive: a number of 17th-century book bindings contained pieces of parchment from a manuscript from the 11th century. The original manuscript may have belonged to a princess who fled England after the Norman Conquest.

For a while, it was uncertain whether prominent American politician Nancy Pelosi would travel to Taiwan. But last Tuesday, she did visit – much to the displeasure of China. Asia expert Casper Wits explains why China reacted so strongly and what the consequences of the visit may be.

Andrew Littlejohn composed a sonic ethnography with sounds recorded in Japan’s northeastern region. To understand the experience of being in the middle of a changing landscape, Littlejohn composed a sonic ethnography called Shizugawa, named after a district in Minamisanriku Town where he recorded.

Our vision of stress is starting to change fundamentally. We can suffer stress without even being aware of it, while sleeping as wall as during the day. Professor of Psychology Jos Brosschot will discuss this phenomenon in his inaugural lecture on 2 December.

What is the best method and time to test the effectiveness of medicines? PhD student Rob van Wijk of the Leiden Academic Centre for Drug Research (LACDR) discovered zebrafish larvae are best used in drug research when they are five days old. His findings were published on 15 February in the journal…

As a student, Ratna Lachmansingh wrote her thesis on horror films. Now she is the director of Leiden International Film Festival.

What exactly do psychedelics do in our brains? To investigate this, NWO has awarded a Vidi grant to Michiel van Elk. The Leiden cognitive psychologist talks about his proposal for serious research into a widespread social phenomenon. 'People describe experiences under the influence of psychedelics that…

During the opening of the academic year, true to tradition the LUC Teaching Prize will be awarded to the best lecture at the University. Get to know the nominees. This week: Christine Espin.

A star does not just appear in the sky overnight. Its creation takes tens of thousands of years. Twenty years ago, astronomers took a picture of a star in its birth phase. The James Webb Space Telescope (JWST) could now capture that same star in much greater detail. This does not only provide beautiful…

'After my BA International Studies I decided to do the MA International Relations, and that proved to be a good choice,' Mats Radeck (23, Trier, Germany) says. He is in the last phase of the MA, working on his thesis on

Nausea, neurologic pain and hair loss: some of the severe side effects of chemotherapy. Not necessary, biochemist Liyan Zhang showed. Together with Leiden biologists and others, she achieved great results with a drug that is only active in combination with light. Zhang will defend her PhD on 4 July.

On Saturday 16 April, secondary school pupils will once again have a chance to sink their teeth into the hardest language-related questions during the final of the Linguistics Olympiad. Professor Sasha Lubotsky and PhD student Cid Swanenvleugel are both former Olympiad winners. Now they are involved…

Scientists often need to make sense of complex systems without knowing the important parameters or even without access to all the information. A collaboration of network theorists, including Diego Garlaschelli (IMT Lucca/Leiden), has now published a review article in the inaugural issue of Nature Reviews…

Students from ‘StudentinzetopSchool’ help schoolchildren and gain valuable teaching experience at the same time. In an online visit on 13 April, Queen Máxima spoke to pupils, students and teaching staff. She also spoke to participants from Leiden. ‘Teaching is wonderful, but it’s complex too.’

Italian nurse Daniela Poggiali was arrested and convicted of murdering two hospital patients in 2014. Her case attracted the attention of Leiden statistician Richard Gill. After his investigation, together with an Italian colleague, Poggiali was acquitted last autumn. Together with fellow statisticians,…

It was a soggy Friday, but the visitors to the Master's Open Day were made of sterner stuff. Bachelor's students from all around the world defied the rain and wind to take a look at Leiden and The Hague to find out more about master's programmes and to get to know the cities themselves.

Freezing bacteria super fast to gain a true-to-nature image of the internal and external structure. Ariane Briegel Professor of Ultrastructural Biology came to Leiden specially to carry out this research. Leiden University is one of the few institutes in the world to have the necessary equipment. Inaugural…

Exploring the minds of our primate cousins in the wild, using under-exploited observations of their travel paths. A large set of observations of the travel paths of wild primates provides new opportunities for in-depth insights in the evolution of the mental abilities that primates, including ourselves,…

Even as a teenager Asa Splinter was determined to study Japanese in Leiden. A HAVO diploma and a change in legislation threatened to throw a spanner in the works, but Asa persevered. After ten years of studying, Asa obtained a master’s degree in Japanese and was nominated for the IHLIA thesis award…

Besides physics, the sleep of PhD students also benefits from Vitaly Fedoseev's PhD research. He will receive his doctorate on July 7 for his work on optomechanics within quantum mechanics. And also on a setup that eliminated the need for PhD students to push a button every hour for 72 hours.

In less than a week’s time, millions of Turkish people are going to decide who will govern their country for the next five years. These elections promise to be the most closely contested in years, with the opinion polls showing very small differences and everything at stake, including for Europe. Alp…

For decades, linguists have racked their brains over the question of precisely how the syntax of various languages is different. PhD candidate Martin Kroon has developed a computer system that brings us closer to finding an answer. His PhD defence is on 10 November.

This year a record number of students - more than 3,500 - will be taking part in the EL CID introduction week. Who are they and why did they opt for Leiden University? 'I want to get the absolute most out of my student time.'

Software development is probably not the first thing that comes to mind when you think of a sociologist. Three years ago, John Boy began developing his software package Textnets. Because of Corona, he was less able to concentrate on writing scientific research and also setting up the online courses…

For the next five years, thanks to a highly competitive European grant, Nadine Akkerman will be able to focus on voices from the past that might otherwise never have been heard. This is because in the 16th and 17th centuries what we now call a ghostwriter already existed. As Akkerman explains, ‘a lot…

Biologist Marcel Schaaf is one of four science faculty members who achieved the Senior Teaching Qualification in Leiden last year. How was that and what drives him? ‘Students receive way too often feedback that they cannot put into practice.’

What developments preceded modern Standard Dutch? PhD candidate Iris Van de Voorde conducted research on ‘pluricentricity’, or the idea that language norms arise in different places and spread outwards from there. PhD defence on 19 April.

Many mosaic stones and potsherds have been excavated, and a Byzantine synagogue is revealing its history layer by layer. The excavations at Horvat Kur are a field school for a young generation of researchers.