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Lycophytes, which appeared some 420 million years ago, are the oldest existing vascular plant group. For a long time, they dominated the forests of the ancient world, and took a broad range of forms, including several arborescent species more than 30 metres tall. Mass extinctions and competition with other plant groups led to the disappearance of these large specimens, and the only remaining members of the group are herbaceous forms no more than a few centimetres tall. These modern species are now being used as a model to study the evolution of terrestrial plants. © D. Barthélémy, CIRAD

Results & impact 29 June 2026

Viral fossils hidden in plant DNA reveal 300 million years of evolution

Health

Global health: a new methodological framework to confirm the elimination of disease vectors

Results & impact 24 June 2026

Global health: a new methodological framework to confirm the elimination of disease vectors

Health

Le Galion watershed in Martinique. © CIRAD

Just out 24 June 2026

Chlordecone in the French West Indies: building a One Health approach

Health

Observation of Kalanchoë

Science at work 23 June 2026

Identifying plant diseases using artificial intelligence

Biodiversity

Pods harvested from a wild cocoa tree in the El Gran Ushashi forest protection zone © X. Argout, CIRAD

Science at work 18 June 2026

On the trail of wild cocoa trees in the primary forests of Peru

Cocoa

Rotting sargassum © J. Réminy, CIRAD

Science at work 17 June 2026

Sargassum control in the Caribbean

Territories and collective action