In her book Between Smiles and Grimaces, Mariska Kret shows us what differences there are between humans and animals, and more importantly, what similarities.

Can SMILE, our multi-component intervention, which combines cognitive-behavioural therapy for insomnia, mindfulness, stress, and lifestyle components, improve sleep quality? Can it also improve mood and quality of life and prevent depression and anxiety in the long term?

Spontaneously helping one another, why do we bother? It is believed that lending a hand to others promotes social bonding, helping us to connect with each other and even build friendships. In our experiment, in which the adult researcher ‘accidentally’ dropped matches on the floor, most adolescents…

Developing new medicines is one of modern science's most significant hurdles, a process marked by high costs, long timelines, and frequent failures of promising candidates.

We are proud to announce that the 1st Volume of INTER-SECTION is now available.

Research at the Leiden University Centre for Linguistics (LUCL) focuses on linguistic variation and diversity. In order to create more awareness and scientific understanding of this topic, research activities are clustered around six (overlapping) umbrella programmes. Many of our researchers are active…

A virtual hand that feels as if it is your own. Feeling happier because a virtual face is smiling with you. Cognitive Psychologist Ke Ma discovered using virtual reality that the way we experience our body is more flexible than we thought. Ma: ‘We can think up some fantastic applications.' PhD defence…

Information about the situation in Ukraine

Browse the latest articles and issues of Inter-Section.

Young babies laugh like adult apes do: producing sounds while inhaling and exhaling. Adult humans produce sounds on the exhale only. Cognitive psychologist Mariska Kret and colleagues have published an article about the development of human laughter in the journal Biology Letters.

Silver jewellery, sculptures made of cork and intriguing photos of psychiatrists' treatment rooms. Staff at Leiden University exhibit their artworks in the Old Library. The summer exhibition can be viewed until 12 August.

Life Sciences Artificial Intelligence Data Science

The goal of hit discovery is to identify suitable chemical starting points to modulate a drug target. A hit can be, a.o., a small molecule, a protein or mRNA. Hit identification is performed via rational design, genome mining, (targeted) library screening, or in silico approaches.

Siemens recently took over the Leiden software company Culgi, founded by professor and inventor J.G.E.M. (Hans) Fraaije. We spoke to him about the algorithm that made him successful, the role of a university in our society and his ambitions at Siemens. ‘I was looking for Siemens, and they were looking…

A virtual hand that feels as if it is your own. Feeling happier because a virtual face is smiling with you. Cognitive Psychologist Ke Ma discovered using virtual reality that the way we experience our body is more flexible than we thought. Ma: ‘We can think up some fantastic applications.' PhD defence…

On 18 July 2018 former President of South Africa Nelson Mandela would have been 100 years old. In 1999 the anti-apartheid activist received an honorary doctorate from Leiden University. His response was modest: 'This is not a personal achievement. It is a tribute to all those who were involved in the…

Leiden University's Pre-University College is celebrating its 20th anniversary. The programme introduced hundreds of secondary school pupils to science and the university. We asked those involved how PRE became so popular: ‘The students are the reason it still exists today.’

On Wednesday 19 October 2022, the graduation ceremony for the International Relations MA programme took place. In the Teylerszaal of the Academy Building, the cohort of Master's students received their diploma.

Vera Meester has won the annual Physics Image Award 2016, with her photo of 'smiling' colloids. The Volkskrant published the picture as Image of the Week.

A standing ovation. A wave and a smile from the president. A final selfie. Ukrainian President Volodymyr Zelensky addressed students in the Netherlands for the first time on Tuesday morning via a livestream in The Hague. He did so in front of two packed lecture halls at both Leiden University and The…

Smiling faces, sweltering heat and a record-breaking donation – that was the Leiden Science Run 2025. On Saturday 21 June, the Leiden Bio Science Park turned bright orange as enthusiastic runners completed 4.5 kilometres to support research for vulnerable children.

Nelson Mandela, former President of South Africa, who died on 5 december 2013, received an honorary doctorate from Leiden University in 1999. Mandela’s response was modest: ‘It is not a personal achievement. It is a tribute to all those who emerged from underground, from prison, from exile...’

Wearing All Stars and ‘just’ a pair of jeans, with a backpack slung over his shoulder. It was an informal Friday afternoon with Mark Rutte, NATO Secretary General, at Wijnhaven. Perched on a desk, he took questions from students in the audience.

Jasper de Bie, who obtained his doctoral degree at the Institute of Criminal Law & Criminology and who is currently employed by the Ministry of Security and Justice, has been awarded an honourable third place in the international competition 'TRI Award for the Best Doctoral Dissertation on Terrorism…

Hortus prefect Paul Keßler was a part of the delegation of Leiden researchers that traveled to Indonesia on a knowledge mission. In two weeks, he visited seven different universities and institutes and of course he also went to see three botanical gardens.

Five mathematics students from Leiden University and their coach stood out this summer in Bulgaria at the IMC: the International Mathematics Competition for university students. Lance, Ryan, Casper, Mads and Lars tackled tough maths problems and also made the most of the Bulgarian sunshine.

Professor of Molecular Astrophysics Ewine van Dishoeck is portrayed as a heroine in a pictorial children's book. ‘It starts with a dream' tells the stories of twenty exceptional Dutch women who have had a positive impact on society. The book aims to give young girls role models and encourage them to…

Leiden University and Delft University of Technology are committed to providing you with a quality graduate education by scientists who bring their cutting-edge research into the classroom. For the Industrial Ecology MSc programme, both universities integrate the expertise of two internationally recognised…

Photographing fluorescent flowers, searching for frogs and shooting tropical cucumbers out of trees: this is only a small part of the course Tropical Biodiversity and Field Methods. For this class, master’s students biology traveled to Malaysian Borneo for two weeks to gain experience in fieldwork.…

How do cells repair their damaged DNA—and what happens when that process is hindered and cancer arises? Sarah Moser has taken a closer look during her PhD, uncovering surprising insights that could help improve future cancer treatments.

The 289 students who recently moved into the tower on Kolffpad at the Leiden Bio Science Park are sitting pretty. A self-contained unit in the middle of the campus yet surrounded by green, with a launderette, games room and study area on the ground floor, and, coming soon, a branch of Coffee Star.

For many years, he was active in various management positions at the LION and even after his retirement he is still very involved. Professor Jan Aarts leads the Leiden hub of the Quantum Delta NL growth fund and is now temporarily responsible for national educational activities. In this way, he is helping…

In 2015, Jorryt Matthee thought he discovered an extremely distant galaxy called CR7, which lacked elements heavier than helium. Three years later, he shows with measurements using the ALMA telescope that the galaxy does have carbon after all, and even in normal concentrations. The American Astronomical…

Leiden PhD candidate Jo-Anne Verschoor discovered that nearly twenty percent of the bacterial strains she studied could degrade plastic, though they needed some encouragement to do so. ‘Bacteria are just like people,’ says Verschoor. Her research was published in the journal Communications Biology,…

Not only does she excel at her research, she is also active in outreach and started a collaboration outside her own field during her PhD. Yevheniia Cheipesh has been awarded the first prize in the For Women in Science Rising Talent Prize by L’Oreal, UNESCO and the Royal Holland Society of Sciences and…

The Chairman IBM Europe & Country General Manager IBM Netherlands, Harry Van Dorenmalen, gave a guest lecture in the M.Sc. ICT in Business course ‘˜Change Management‘™. Van Dorenmalen emphasized the need in the current knowledge economy for people to become specialists. His lively lecture discussed…

Martin van Hecke and Lennard Kwakernaak (Leiden university and AMOLF) develop a mechanical metamterial that can count to ten in their research.

It is a stormy Sunday afternoon, with gusts of a whopping 110 kilometres per hour. Chemist Teun Sweere defies the enormous headwind on his city bike and wins the NK Headwind cycling after 22,5 minutes. A new highlight follows six months later: his PhD defence (14 June).

It was already the most cited publication ever written at our faculty, but now a new milestone has been reached. Last month, a paper by emeritus professor Jan Reedijk and his co-authors surpassed 10,000 citations — and the count keeps rising.

Why use Google Maps when you can also calculate your bike route based on your own data. Statistician and cyclist Alexander Dürre sees statistics in everything around him. He analyses data of soccer games and calculates the possible winners of cycling races. ‘When I have too much time, I apply statistics…

Erection problems can have a huge impact on quality of life and health, but current diagnostic methods are painful, uncomfortable and technologically outdated. PhD candidate Evelien Trip has developed a new device that can measure erections more comfortably and painlessly.

Researchers from Leiden University are working with Ouwehands Zoo to improve our understanding of emotions and intelligence in orangutans. Visitors to the zoo can now watch orangutans as they play with computer touch screens.

More than twenty students were awarded an ALGANT diploma, the prestigious two-year master's in Algebraic Geometry and Number Theory from the Mathematical Institute of eight collaborative Universities on July 18th. At the graduation ceremony in Padua, Italy, five students who had spent their second year…

Vedran Dunjko appointed to full professor of quantum computing at Leiden University, the Netherlands.

A new government, conflicts around the world and obviously a lot of science: these are the five stories about Leiden University that you enjoyed reading in 2024.

Paul Wouters received the RISE Award, an award by the women’s network RISE, for his commitment to increasing gender equality at the Faculty of Science. ‘It makes it clear that it is possible to truly make a change in 9 months. That is why I am happy with this award.’