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Three people talk in front of a board covered in mathematical formulae, illustrative photograph.

AI · Nov 6, 2026OpenAI and the ETH hypothesis: what the result claims, and what remains to be understoodOpenAI announces a refutation of the Exponential Time Hypothesis. The paper and the researchers’ letter help explain its significance, without confusing it with Ethereum.

Capsules being poured from a bottle into a hand — illustrative photo.

Health · Nov 6, 2026Vitamin D and memory: why the study does not justify high dosesA signal observed in 54 adults has intrigued researchers. The study’s limitations and clinical trials mean it cannot be turned into supplementation advice.

Walnut halves arranged in a circle on a light background.

Health · Nov 6, 2026Nuts and high blood pressure: understanding the reduced risk observed in a studyA meta-analysis links around 30 grams of nuts a day with a lower risk of high blood pressure. The figure does not predict your individual blood pressure.

A man cools his head under water from a fountain, illustrative photograph.

Climate · Nov 4, 2026Climate and health: what the 2026 Lancet Countdown warning revealsMortality, exposure and protection: the 2026 report shows why the health effects of climate change demand more than a response to heatwaves.

View of the port of Pointe-à-Pitre behind the seafront houses.

Culture · Nov 4, 2026Route du Rhum: looking at Guadeloupe beyond the finish lineThe race draws attention to the archipelago. The Mémorial ACTe and UNESCO resources offer another way of understanding the Atlantic, attentive to people, places and legacies.

The Vera C. Rubin Observatory in Chile, beneath an orange sky at sunset.

Space · Nov 2, 20262026 ED138: what the candidate for dwarf-planet status really revealsSpotted in Rubin data, this distant body also appears in TESS archives. Its orbit is becoming clearer, but its size and shape remain to be established.

Archive view of old Antibes and its seafront, illustrative photograph.

AI · Nov 1, 2026In Sophia Antipolis, European AI is also shaped between laboratories and businessesAfter the IASP world conference, Sophia Antipolis’s ambitions raise a practical question: how can AI research, skills and applications be connected?

Three people discuss in front of a mathematical blackboard, illustrative photograph.

AI · Nov 1, 2026OpenAI and Yang–Mills: understanding the announcement without confusing the evidenceOpenAI claims to have proved existence in quantum physics. The Yang–Mills problem also requires a mass gap: here are the key distinctions for understanding the announcement.

View of Grenoble, the Isère and the surrounding hills from the area around the Bastille.

Innovation · Nov 1, 2026CEA Grenoble: from former reactors to the technologies of tomorrowWhy did CEA Grenoble change direction? From dismantled reactors to the FAMES pilot line, a change of focus to distinguish from ILL’s activities.

Xiaozhai sinkhole seen from its southern rim, with its limestone cliffs and vegetation, in November 2009.

Nature and environment · Nov 1, 2026Xiaozhai Tiankeng: understanding China’s sinkhole and its forestsAt Xiaozhai, the sinkhole reaches a depth of 662 metres, depending on the point of measurement. This spectacular landscape has long been known; research into tiankengs sheds light on the links between landforms, water and living things.

Blackboard covered in scientific formulae in chalk; illustrative photograph.

AI · Nov 1, 2026AI and scientific evidence: what Lean checks, and what still needs examiningOpenAI’s announcements have revived the question of evidence produced by AI. The logical core, assumptions and results of AlphaProof: key points for assessing them.

Artist’s impression of TOI-561 b and its atmosphere above an ocean of magma; illustration published in 2025.

Space · Nov 1, 2026TOI-561 b: how Webb is investigating the clouds of a lava planetA study of infrared variations from TOI-561 b favours a highly reflective atmosphere. Here is what Webb is actually measuring, what the models explain and what remains to be verified.