For the first time, astronomers have observed in three dimensions that gas from spiral galaxies is blown upwards and downwards at high speed, far out of the galaxy. They thereby confirm the theory of galaxy evolution: that star-forming galaxies create intergalactic gas flows by discharging gas along…

Two teams of astronomers, including one from Leiden University, have discovered oxygen in the most distant known galaxy, JADES-GS-z14-0. This groundbreaking discovery shows that galaxies could form much faster in the early universe than was previously thought.

How do galaxies form? That is what astronomer Mariska Kriek will be researching in the coming years. She received an NWO Vici grant of 1.5 million euros to study galaxies in the early universe. ‘This research uses new and unprecedented observations from the James Webb Space Telescope (JWST). These allow…

Researchers have discovered the most distant Milky-Way-like galaxy yet observed. Dubbed REBELS-25, this disc galaxy seems as orderly as present-day galaxies, but we see it as it was when the Universe was only 700 million years old. This is surprising since, according to our current understanding of…

An international team of astronomers has discovered a large reservoir of hot gas in the cluster-in-formation around the Spiderweb Galaxy. Based partly on that hot gas, the astronomers predict that the cluster-in-formation will grow into one of the largest objects in the universe. A step closer to discovering…

Last Saturday, Reijer Passchier was a guest on one of his favourite radio programmes: Dr. Kelder en Co.

The shock wave triggered by one of the five galaxies making up the iconic Stephan’s Quintet appears to be less disruptive than previously thought, with the shock likely being cushioned by dust particles in the surrounding gas. This is according to the analysis of the first scientific observations of…

Finally we know for sure that there is a black hole at the centre of our own galaxy. Today, astronomers unveiled the first ever photo of Sagittarius A*, a super-massive object at the centre of the Milky Way. This picture could only be taken thanks to the cooperation of telescopes worldwide.

An international team of astronomers led by Dutch scientist Martijn Oei has discovered the largest pair of jets from a black hole ever seen. The 'jumbojets' extend a combined length of 140 Milky Ways. The Leiden Observatory played a prominent role in this research. The publication will feature on the…

An extraordinary encounter took place in 1911. American scientists discovered the last 'wild' Indian, from the Yahi tribe, who had lived in total isolation for years. As he had no name, they called him Ishi. But who was this man, and what did this discovery mean to us? Cultural anthropologist Erik Bähre…

Associate Professor Erik Bähre talks about the upcoming elections in Brazil on the Dutch Radio channel BNR Radio.

An international team of researchers led by astronomers from Leiden University (the Netherlands) has produced the first sharp radio maps of the universe at low frequencies. Thanks to a new calibration technique, they bypassed the disturbances of the Earth's ionosphere. They used the new method to study…

Simulations of galaxy formation provide much more information about galaxies than a telescope. Simulations have been improving significantly in recent years. Astronomer Evgenii Chaikin made such a significant contribution to this field that he graduated with honours on February 27th.

Astronomers have found complex organic ice outside the Milky Way for the first time. The discovery shows that the building blocks of life could arise early in the universe - and under a variety of conditions, said Leiden astronomer Will Rocha.

Ruim twintig nieuwsgierige medewerkers en studenten kregen een rondleiding in het nieuwe universiteitsgebouw van de Universiteit Leiden aan de Grote Marktstraat en het Spui in Den Haag dat in september 2025 de nieuwste locatie van de Campus Den Haag gaat worden. Nu is het vooral een kwestie van door…

‘A Muslim and a Jew in the house of God.’ This is how historian Nadia Bouras introduced her recent conversation with colleague Sara Polak in Leiden’s Hooglandse Kerk. They discussed the rising tensions since the outbreak of the Israel-Hamas war. ‘Dare to ask each other questions.’

De crèche en het klaslokaal zijn misschien wel de meest gunstige plekken voor ziekteverwekkers. Toch is er relatief weinig bekend over hoe kinderen reageren op virussen en bacteriën en hoe het komt dat sommige kinderen veel beter beschermd zijn dan anderen. Simon Jochems, onderzoeker aan het Leids Universitair…

Hungarian Prime Minister Viktor Orbán addressed the Conservative Political Action Conference (CPAC) in Texas last week. University lecturer Andrew Gawthorpe explains in an interview with ABC Radio what the embrace of 'Orbánism' means for the American right, and democracy more broadly.

The Dutch public broadcasting organisation NPO has asked State Secretary for Culture and Media Gunay Uslu to revoke the licence of Ongehoord Nederland. Wouter Hins, emeritus professor of media law, explains how unique the NPO’s request is.

The Israel-Palestine conflict regularly sparked intense debates in university lecturer Noa Schonmann's classes. She decided to start a podcast with journalist Rajaa Natour to teach her students to have deep and difficult conversations in a nuanced way.

In a one-hour interview on Dutch radio programme Sleutelstad, Anne-Laura van Harmelen talks about her research into the role friendships in adolescents' well-being, the resilience paradox and the role of social, hormonal and genetic factors in stress-levels and resilience.

Microsoft’s new software VALL-E only has to hear a voice for three seconds to be able to imitate it almost perfectly. You can choose which emotion the voice should use and what it should say. Valerie Frissen, Professor by special appointment of Digital Technology and Social Change at eLaw, and Director…

On 8 October, Armin Cuyvers was interviewed by RTLZ News and BNR News Radio on the shocking ruling by the Polish Constitutional Tribunal of 7 October 2021 (both in Dutch).

Economic Anthropologist Erik Bähre talks on the Dutch News Radio Channel BNR about the effects of the Russia-Ukraine grain agreement for African countries.

Jeanine de Roy van Zuijdewijn, researcher and lecturer at ISGA, was a guest on NPO Radio 1 where she discussed the attacks carried out in 2011 by Anders Breivik.

In november 2023 is Anne Fleur van Veenstra, wetenschappelijk directeur van TNO Vector, benoemd tot bijzonder hoogleraar ‘Governance van data en algoritmen voor stedelijk beleid’.

Tijdens de Dies Natalis worden elk jaar de Leidse Universitaire Scriptieprijzen uitgereikt. Elke faculteit selecteert hiervoor haar beste scriptie. De beste scriptie van FGGA is geschreven door Leah Beekhuizen met de titel: ‘De lusten of lasten van radicale collega-belangenbehartigers’

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.

Not everything that comes close to a black hole is swallowed by it. Black holes can also hurl material away, and that chance turns out to be considerably bigger than previously thought. Martijn Oei's accidental discovery and his subsequent research on it earned him a cum laude promotion on 12 Decemb…

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Arts and culture

Several Spanish news outlets have published interviews with Associate Professor Eric Storm about his new book Nationalism.

The Leiden archaeologist Harold Berghuis was closely involved in archaeological discoveries off the coast of Java. Skull fragments and other fossil remains provide new insights into the world of Homo erectus. The discovery was the subject of numerous news reports.

An internship or research project abroad is not only a fun and educational experience, it's also a great asset to your CV. As job markets are becoming increasingly international, employers tend to view international experience as a big advantage. Read more about how to arrange an internship or project…

Buried beneath a Suffolk forest, archaeologists have uncovered the earliest known human-made fire. A fire that was sparked 400,000 years ago. This stunning UK discovery rewrites our evolutionary story, pushing fire-making back by more than 350,000 years. Baked earth, heat-scarred tools and the world’s…