In contrast, a crouched stride yielded markedly deeper toe impressions than heel impressions, reflecting faster weight transfer over the length of the foot.

The laser scans can track details as small as an eighth of an inch and have swept the entire ship across its 114-foot length and 28-foot width — once a cramped home to a crew of 35.

When he cannot use his eyes to guide his steps, he will walk straight only if he takes a step of the same length with each foot.