Benign paroxysmal positional vertigo (BPPV), the most common cause of vertigo, affects one in five people at some point during their lifetime, triggering the sudden feeling like one is moving or spinning when perfectly still. Early pieces of this medical puzzle appeared in the early 19th century in studies of the inner ear, yet the cause and cure for BPPV was not clearly understood until the late 20th century and it took a few more decades before...