A group of biology students are working on a solution to the world’s plastics problem by getting bacteria to make biodegradable plastic.

The European Commission awarded the project proposal INSIGHT, a follow-up project on illegal firearms trafficking and gun violence from Professor Social Resilience and Security Marieke Liem and PhD-researcher Katharina Krüsselmann of the Institute of Security and Global Affairs (ISGA).

Imagine scanning lion dung or a mouse dropping and instantly knowing exactly what and how much the animal has eaten. Thanks to new DNA techniques, this is becoming increasingly feasible. PhD student Kevin Groen tested how effective these techniques are at unraveling the diets of wild animals.

Finland reduced its suicide rate from 30 deaths per 100,000 citizens. Marieke Liem and Leah Prencipe discuss this in The Conversation.

Scientists have discovered that starlings and parrots can imitate the complex sounds of Star Wars droid R2-D2 remarkably well. Their study reveals how the structure of a bird’s vocal organ determines its vocal abilities – and how citizen science helps uncover it.

This year Leiden will be celebrating the 450th Relief of Leiden. Leiden master’s students are researching this history as part of the ‘Traces of 3 October’ project.

Even embryos can become embroiled in an evolutionary arms race with another species. Leiden biologists demonstrate this with larvae of the rosy bitterling that parasitize the gills of freshwater mussels. They published their research on February 19 in PNAS.

The sixth specialisation of the Master Crisis and Security Management (CSM) will start in September 2023: Governance of Violence. Coordinator of this track is Professor Marieke Liem. She talks about the how and why of this new track and the importance of research in and knowledge of the nature and scope…

PhD student and research journalist Sebastiaan Grosscurt won a Tegel in May. In the data category, Grosscurt and his colleagues won the prestigious Dutch journalism award. 'For me, ecological research and journalism are two ways of achieving the same thing.'

In het LUMC in Leiden onderzoeken ontwikkelingspsychologen hoe kinderen en jongeren omgaan met emoties. Daarvoor maken ze een mri-scan van de hersenen van de deelnemers (9 - 16 jaar). De 11-jarige Olivier in het Jeugdjournaal: ‘Ik vind het leuk om het onderzoek te helpen.’ Wil je ook de wetenschappers…

She narrowly defied bureaucracy and spent days angling for cod. In the North Sea, marine biologist Inge van der Knaap discovered that noise significantly disturbs fish behaviour. ‘There is now a lot of attention for underwater noise.’

Aesthetic attraction plays a big role in orangutans’ mate choice, behavioural biologist and PhD candidate Tom Roth has observed. But to discover just how big that role is, more research is needed into the emotions of the great apes.

On 8 March, International Women’s Day, equal opportunities for women worldwide, empowerment, and gender equality take centre stage. This day has been celebrated in the Netherlands since 1912, usually centring around a specific theme. This year’s theme: solidarity, the power for change.

Wolves in the Netherlands mainly feed on wild animals such as wild boar and red and roe deer. But in areas such as Drenthe where these are scarce they also prey on free-roaming cattle used for nature conservation

Are all murderers calculating psychopaths with an obscene predilection for bloody chainsaws? Yes, if Hollywood is to be believed, but in the real world they are generally everyday people with problematic backgrounds. Professor of Violence and Interventions Marieke Liem therefore calls for the demythologisation…

On 25 November, the global 16-day campaign 'Orange the World' against violence against women and girls started. Leiden University will also be paying attention to this campaign. On Friday 9 December, Renate van der Zee and Marieke Liem will give a lecture at the Campus The Hague (Spanish Steps, Wijnhaven)…

Education, Organisation

Ten projects have been selected during the fourth call in the Seed Funding Programme launched by EUniWell. Marieke Liem, Professor Social Resilience and Security, has received a grant for the MASTERY project.

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…

Women are more often diagnosed with depression, whereas ADHD is much more frequently detected in men. And there are other more striking differences. What role does the brain play in mental health and what is the influence of the environment? For answers to these questions, listen to the ‘(Un)gendered…

In the academic year 2021-2022 the Social Resilience and Security interdisciplinary programme will offer two courses for interested students who are entering the third year of their Bachelor's degree. You can sign up for these courses in your elective (minor) space. The courses are available to students…

The annual homicide rate has decreased considerably since the 1990s. In their hunt for an explanation, researchers Pauline Aarten and Marieke Liem made a surprising discovery: if you divide homicides into categories, you find significant differences in the homicide rate. Publication in the European…

In Bronze Age Europe many bronze objects such as axes, swords and jewels were deliberately left at specific spots in the landscape. PhD research by Leiden archaeologist Marieke Visser shows that these practices were expressions of people’s relationship with the world around them. ‘It was a completely…

Brain scans, heart attacks and credit scores: many science applications revolve around data. But how do you mine applicable insights from a mountain of data? In a Bachelor Honours Class, students discover how data science can contribute to their discipline.

Leiderschap in een publieke organisatie is niet langer voorbehouden aan managers alleen. Daarnaast vereist modern leiderschap toepassing van een divers gedragsrepertoire. De manager van nu put daarvoor uit een gereedschapskist vol tools, betoogt Marieke van der Hoek, promovenda bij het Instituut Bestuurskunde…

When the tokay gecko loses its tail, a new one grows from resident stem cells at the stump. Each tissue type - muscle, bone, blood vessels and skin - develops from specific stem cells. This discovery by Luthfi Nurhidayat holds potential implications for advancing regenerative medicine in humans. Nurhidayat…

Is our musicality unique? That’s what the Bird Singalong project aims to find out. And for that, they need the help of feathered friends from all around the world. ‘By researching how parrots learn songs, we also learn more about the origin of our own musicality.’ Do you have a parrot that can sing…

Psychologen laten zich horen over de plannen om de internationale bacheloropleidingen op te heffen in de Randstad en Tilburg. Het inititatief #Ikbeneenpsycholoog van Judith Schomaker op LinkedIn vindt navolging. Lees een selectie van de posts en ook het blog van Eiko Fried over de consequenties.

Studenten onderzochten maatschappelijke vraagstukken voor het project Leren met de Stad en presenteerden hun resultaten tijdens een informatiemarkt.

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.

Attention to the colonial past may be increasing, but many aspects of it are still underexposed. Dutch newspaper De Volkskrant, in collaboration with, among others, Leiden researchers Anne-Marieke van der Wal-Rémy and Alicia Schrikker, therefore created a 'Canon of the Dutch Underexposed Past', which…

Connecting as the magic word. Seeking new collaborations, presenting ourselves to the outside world with an open attitude and showing what we do. During the opening of the academic year on Tuesday afternoon, Dean Jasper Knoester emphasised that change and connection are necessary for the university…

During ExpeditionNEXT in Middelburg, NeurolabNL youth, together with researchers from Leiden University and Erasmus University, handed over a unique research agenda to NWO Chairman Marcel Levi. In it, young people share what they would most like to learn about themselves and the brain.

Saniye Çelik, Professor by Special Appointment of Diversity, Inclusion, and Policing at Leiden University, has received the Woman in the Media Award at Beeld & Geluid in Hilversum. She was selected as the winner by the jury from three female experts with the most votes.

Try to resolve the nitrogen problem, go on a regeneration journey or take part in psychological research: discover this and more at the new and improved 3 October University, ‘WetenschapsWarenMarkt’.

During a well-attended Studium Generale lecture at Rijksmuseum Boerhaave, Professor Ellen de Bruijn demonstrated how hormonal fluctuations influence the female brain. 'We urgently need more attention for the mental health of girls and women during transitional periods.'

The winner of the Leiden University Thesis Prize has made an original and substantial contribution to argumentation theory. This is what Annetje Ottow, President of the Executive Board and member of the LUF board, said at the online ceremony for the University’s thesis prizes. The winner of the first…

How do you make effective use of AI and medical technology? And what role do you play in this as a doctor? This is what the LUMC/Leiden University is preparing medical students for, right from the first year of their studies.

In prehistoric times there was a huge wave of migration, from the steppes in Russia and Ukraine to West Europe. The newcomers’ genes began to dominate. Archaeology research in Leiden into burial mounds in the Veluwe and Utrechtse Heuvelrug areas of the Netherlands yielded this spectacular conclusion.…

Talking about suicide is important, but anything but comfortable. To make this difficult subject easier for students and staff to discuss, the university is organising a campaign week in line with the national campaign ‘1K Z1E J3’ (I see you) being run by Stichting 113 Zelfmoordpreventie (113 is the…

While the Netherlands was in lockdown because of the coronavirus, PhD candidate Koen Rijpkema began his research into the same virus. In the lab, he developed molecules that can inhibit an important viral enzyme.

How has evolution shaped our curiosity? And how does that curiosity ensure that we now have the technological ability to discover whether we are alone in the universe? This was all covered during the celebration of Leiden University’s 449th Dies Natalis.

Rogier Hartendorp is professor by special appointment of social effectiveness of justice at Leiden University and a judge at The Hague District Court. So, the perfect person to liaise between our faculty and the Court. We asked him some questions about this role.

Leiden criminologists have co-developed an artificial intelligence technology that tracks firearms incidents by scanning over 350 news sources.

Project TARGET is a research project aimed at the relation between the illegal arms trade and firearm violence. In a study conducted in seven countries, the researchers took a look at the differences and similarities. Katharina Krüsselmann and Marieke Liem took a closer look at the situation in the…

In the academic year 2022-2023 the Social Resilience and Security interdisciplinary programme will offer a new minor for students who are interested in studying interpersonal violence and who are entering the third year of their Bachelor's degree. The announcement went down well with students: the available…

Do children growing up in a jihadist or right-wing extremist household develop the same extremist views as their parents?

Many children experience trauma and if they are unable to deal with it properly, it can have a huge personal and societal effect. Building resilience in vulnerable children and young people should therefore have the highest priority. This is the message of Anne-Laura van Harmelen, Professor of Brain,…

Why doesn't the Surinamese resistance hero and independence fighter Anton de Kom have a memorial site in his former hometown, The Hague, while there are streets named after colonial leaders? The students of university lecturer Anne Marieke Van der Wal-Rémy are committed to the erection of a statue.

Polarisation is pervasive: in the workplace, within teams, and even at the top of organisations. Discussions become entrenched, emotions rise, and collaboration falters. Connections are lost through ‘us versus them’ thinking. The question is how leaders can maintain space for dialogue when tensions…