Image: Julien Dupeyroux, ISM (CNRS/AMU)

Researchers at CNRS and Aix-Marseille University, in the Institut des Sciences du Mouvement – Étienne Jules Marey (ISM) have developed a robot that can navigate outdoors without GPS. The AntBot mimics the cataglyphis desert ants, which navigate using an internal celestial compass based on the sky's polarised light combined with counting their steps taken. The Antbot uses two pixel sensors with polarised filters to measure its movement relative to the sun and achieves a 0.4 degree precision when this is combined with distance covered. 


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