Leiden University

Leiden University was founded in 1575 and is one of the leading international research universities in Europe. The University has seven faculties: Law, Archeaology, Social Sciences, Humanities, Medicine, Natural Sciences and Governance & Global Affairs, spread over campuses in both Leiden and The Hague. Our motto is Praesidium Libertatis – Bastion of Freedom.

Leiden University harbors pioneering research and teaching based on a wide diversity of academic disciplines. The university has excellent research facilities and renowned collections, and a strong and intricate knowledge infrastructure. Over 33,000 students and almost 8,000 staff members form an open, active and engaged University community, with a deep-rooted academic freedom and an intrinsic international orientation. They are driven by the desire to know, understand, interpret and create. They work together to answer the questions of today and keep an eye to the questions of tomorrow.

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The recently discovered 12,000-year-old dice made from wood and bone by Native American hunter gatherers. Robert Madden

Archaeologists have discovered 12,000‑year‑old dice – here’s what they reveal about the history of play

You can compare throwing one of these ancient dice to a coin toss – although this discovery also underscores that dice are much older than coins.
Le 11 mars 2026, des habitants reçoivent l’aide du Programme alimentaire mondial (PAM) dans le quartier d’Al-Omada à Omdurman, la ville jumelle de Khartoum. Les comités de résistance jouent un rôle important dans la distribution d’aide à la population. Ebrahim Hamid/AFP

La révolution soudanaise sept ans après : mise à mal, mais non vaincue

Retour sur la longue histoire de la résistance civile au Soudan et sur la manière dont les réseaux communautaires et les mouvements de jeunesse jettent les bases d’un retour à l’ordre pacifique dans un pays marqué par une profonde fragmentation politique.
Protest action worldwide has shown unrelentless support for the people of Sudan whose community-led peacebuilding efforts continue to strive against ongoing fighting, mass displacement and afflicted medical facilities. Philippe Gregori/Shutterstock

The Sudanese revolution seven years on: undone but not defeated

We look at Sudan’s long history of civilian-led resistance, and how community networks and youth movements are laying the foundations for re-establishing peaceful rule in a country marked by deep political fragmentation.
Experimentos sugerem que não são apenas as experiências místicas em si, mas as expectativas e contexto que levam aos benefícios observados na terapia psicodélica. Yavuz Meyveci/Shutterstock.com

Experiências místicas com psicodélicos realmente trazem benefícios para a saúde mental?

A terapia psicodélica frequentemente promete experiências místicas transcendentais. Mas pesquisas sugerem que o contexto e a expectativa podem ser mais importantes do que a viagem em si.
A informação, antes tratada como uma ferramenta abstrata usada para rastrear estados ou probabilidades, tem sido cada vez mais reconhecida como uma quantidade física por si só, assim como a matéria ou a radiação, e isso muda totalmente nossa compreensão do Universo. Pack-Shot/Shutterstock

Discreta revolução na Física sugere que o tempo não é uma parte fundamental da realidade

Até recentemente os físicos em geral acreditavam que o tempo era uma característica básica do Universo, mas ele pode simplesmente emergir da informação cósmica.
Illustration tirée de l’édition par Ambroise et Jérôme Drouart, au XVIIe siècle, du poème Civitas veri sive morum (la Cité de la vérité), de Bartolomeo del Bene (1515-1595). University of Illinois

La démocratie est‑elle seulement une question de vérité ?

Crise de la démocratie et crise de la vérité sont liées. Mais nous vivons aussi une crise du sens, distincte, qu’exploitent les ennemis de la démocratie.
Une sculpture représente les visages des présidents (de gauche à droite) Vladimir Poutine, Xi Jinping, Kim Jong-un et Donald Trump dans un centre commercial de Bangkok (Thaïlande), le 24 septembre 2025. Chanakarn Laosarakham/AFP

Comment les États autoritaires orientent les débats pour saper nos démocraties

La Russie et la Chine diffusent et promeuvent des contenus qui présentent les États occidentaux comme chaotiques, immoraux, ou tout simplement absurdes.

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