Press release | A French researcher expelled from the United States: the French Academy of sciences reacts

Paris, March 20, 2025 

On March 9, a French researcher from the Centre national de la recherche scientifique (CNRS) was turned back by the United States on his way to a scientific congress in the field of space research. His phone and computer were searched, and for a time he was threatened with legal action due to the presence of messages considered hostile to President Donald Trump.

The French Academy of sciences strongly protests against this practice and decision, which seriously undermines the fundamental freedoms of the academic world: freedom of thought, expression and travel. It is concerned by the restrictions thus imposed in the United States on free communication between researchers, on their freedom of movement and on international cooperation, essential foundations for the progress of scientific knowledge. It calls on international scientific institutions to react to this unprecedented situation and denounce an authoritarian drift harmful to science.

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