Seeing in the Dark: Dynamics in opaque porous materials To enhance the healing of degraded soils, it is of prime importance to understand how microorganisms navigate through such environments before settling in. Since soils are opaque, internal dynamics can only be probed experimentally with X-ray beams. Yet, an image analysis tool to quantify particle dynamics in these highly heterogeneouspar sophiemarbach - Thèses hors de l'EDPIF