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Biodiversity: what satellites can measure, and what needs checking on the groundThe ESA is strengthening its ecosystem-monitoring tools. But a protected area on a map does not, by itself, prove that nature is doing better there. Here’s how to read this new data.
How shells preserve traces of the marine climateGrowth lines, isotopes and chemical analyses: researchers use shells as ocean archives, while taking care not to confuse local signals with the global climate.
Bleached corals and jellyfish: how to read the signs of an ocean in changeNOAA confirms the scale of heat stress on reefs, but jellyfish blooms do not follow a simple global pattern. Scientists explain why.
Guillaume Pitron: why the oceans are becoming a new arena for rivalryIn *Océans. Le nouveau partage du monde*, published on 14 October 2026, the journalist examines the scramble for undersea resources. The law of the sea and ecological risks shed light on what is at stake.
Bleached corals: why contact with a healthy clone speeds up their recoveryAn experiment at Stanford enabled five bleached fragments to recover through contact with genetically identical corals. The results are promising, but still limited to the laboratory.
Biodiversity: counting species is not enoughA review of 423 studies examines the functions of biodiversity.