How does multilingualism slow down brain aging?

Pierre-Marie Lledo, Research Director at CNRS, Head of Department at Institut Pasteur, and member of the European Academy of Sciences

On January 27th, 2026 6 min reading time

The ability to communicate in multiple languages helps slow the ageing of the brain.

From control to incentives: the evolution of demographic policies in China

Pauline Rossi, Professor of Economics at Ecole Polytechnique (IP Paris) and Researcher at CREST

On January 27th, 2026 3 min reading time

Although the one-child policy has now been abolished, the habits developed under it have remained in many families.

Satellites are detecting plastic pollution in the ocean worldwide

Jérôme Benveniste, Chair of the COSPAR Scientific Committee on Space Studies of the Earth's Surface, Meteorology and Climate, formerly Senior Adviser at ESA, Audrey Hasson, Doctor of Physical Oceanography and Executive Director of the GEO Blue Planet Initiative, François Galgani, Senior Scientist at Ifremer, Specialist in the Marine Environment and Pollution

On January 27th, 2026 3 min reading time

Observing the oceans via satellite can help better anticipate peaks in plastic pollution.

Didier Bazalgette

Cognitive training for war: how to prepare for uncertainty

Didier Bazalgette, Doctor of Neuroscience, former AI and Cognitive Sciences Advisor to the Defense Innovation Agency , Paul Janin, PhD student in Cognitive Science at CEA Paris-Saclay

On January 21st, 2026 5 min reading time

Why greenhouse gas reduction reveals a series of paradoxes for China

Jean-Paul Maréchal, Associate Professor in Economics at Université Paris-Saclay and Deputy Director of IDEST

On January 21st, 2026 4 min reading time

In 2021, China’s production capacity accounted for the majority of photovoltaic and wind power.

How AI is emerging as a teammate for mathematicians

Amaury Hayat, Professor at École Nationale des Ponts et Chaussées (IP Paris) and Specialist in AI for Mathematics

On January 21st, 2026 5 min reading time

AI can help free up time and assist researchers but also alter the nature and frequency of scientific publications.

Bertrand Folléa 0921–01b

Energy transition: how to improve urban landscapes

Bertrand Folléa, Director of Landscape and Energy Chair at Ecole Nationale Supérieure de Paysage (Versailles-Marseille)

On January 13th, 2026 4 min reading time

Are modern uncertainties fragmenting our shared sense of reality?

Gérald Bronner, Professor of Sociology at Sorbonne université

On January 13th, 2026 6 min reading time

As with Donald Trump in the United States, the dangers of rewriting reality can lead to feelings being considered markers of truth and reality.

Could a “digital umbrella” guarantee digital sovereignty in the era of hybrid warfare ?

Maud Quessard, Lecturer and Director of the “Europe, Transatlantic Area, Russia” department at the French Institute for Strategic Research of the École Militaire (IRSEM)

On January 13th, 2026 4 min reading time

Digital sovereignty is becoming increasingly paramount, as digital destabilisation no longer requires a formal declaration of war.

Nobel Pride: when universities claim borrowed glory

Maximilian von Zedtwitz, Professor of Strategy at the University of St. Gallen and Visiting Professor at Ecole Polytechnique (IP Paris)

On January 6th, 2026 5 min reading time

False claims about links between universities and Nobel Prize winners make it difficult to determine the factors driving scientific success.

Training the tactical brain: where cognitive science meets military excellence

Emmanuel Phelut, Director of Centre de l’Enseignement Militaire Supérieur-Terre (CEMS-T), Jean Langlois-Berthelot, Doctor of Applied Mathematics and Head of Division in the French Army

On January 6th, 2026 5 min reading time

At CEMS-T, classes and training cohorts offer a decision-making laboratory.

Claire Huber_VF

How satellites are redefining earthquake science

Claire Huber, Engineer and Project Manager in Remote Sensing and GIS (Geographic Information System) at SERTIT, Cécile Lasserre, CNRS Research Director at the LGLTPE laboratory

On January 6th, 2026 4 min reading time

All-solid-state batteries: a revolution in electricity storage?

Jean-Marie Tarascon, Professor at Collège de France, specialist of Solid-State Chemistry

On December 9th, 2025 3 min reading time

Solid-state batteries offer advantages compared to lithium-ion batteries, including energy density, but their development still requires further study.

How AI is affecting quality of factual information

Thierry Warin, Professor of Data Science for Global Transformations at HEC Montreal

On December 9th, 2025 3 min reading time

Adapting verification mechanisms and building trust in information are the key pillars to consider in the face of new technologies.

Cédric Gossart_VF

CSR: why overly simplistic indicators can be misleading

Cédric Gossart, Senior Researcher in Management of Innovation at INGENIO (CSIC-UPV), Benoit Tezenas du Montcel, Assistant Professor at Institut Mines-Télécom Business School, Jacques Combaz, CNRS Research Engineer at VERIMAG, David Ekchajzer, PhD Student at Université Évry Paris-Saclay

On December 9th, 2025 3 min reading time

The scourge of manipulation: how can we combat deepfakes?

Célia Zolynski, Associate Professor of Private Law at Université Paris 1 Panthéon-Sorbonne

On December 2nd, 2025 4 min reading time

Faced with the influence of deepfakes, the EU is seeking to prevent the manipulation of public opinion and the distortion of individuals' images.

Quantum: the second revolution unfolds

On June 5th, 2024 1 min reading time

What is quantum physics? What are the applications of quantum technologies? Dive into the universe of the infinitely small with this issue of 3.14.

Is it time to think about critical resources for fusion energy?

Jacques Treiner, Research Associate at Université Paris Cité and Chair of the Shift Project Expert Group, Gérard Bonhomme, Professor Emeritus at Université de Lorraine and Chair of the Energy & Environment Committee of the French Physics Society

On December 2nd, 2025 4 min reading time

Nuclear fusion’s dependence on scarce resources could hamper the deployment of reactors in the future.

Corentin Juin_VF

Sustainability: Ikea, Patagonia and Unilever put to the test

Corentin Juin, PhD student in Innovation Management at Ecole Polytechnique (IP Paris), Valentine Georget, Lecturer in Management at the Université Côte d’Azur and Researcher at GREDEG, Thierry Rayna, Researcher at the CNRS i³-CRG* laboratory and Professor at Ecole Polytechnique (IP Paris)

On December 2nd, 2025 4 min reading time

The AI bubble: deciphering an economic phenomenon

Pierre-Jean Benghozi, Emeritus CNRS Research Director at Ecole Polytechnique (IP Paris)

On November 25th, 2025 6 min reading time

Despite massive investments, the AI economy remains fraught with profound uncertainty as impacts on growth and productivity remain unclear.

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Batteries: the challenges of energy storage multiply

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Foresight: understanding the methodology

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