Do Sand Dunes “Breathe”? The Marching Hills That Walk Across Highways
Every year, drivers in desert regions watch a strange, silent procession: hills of sand advancing across asphalt, swallowing guardrails and warning signs as if the road were a riverbed. The spectacle invites a deeper question that sounds almost mystical – do dunes, in some sense, breathe? Scientists say the answer is both yes and no, ...
