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She unpinned her hat and rummaged in her jewelry case.

Insects, however, present a formidable challenge—each one typically needs to be unpinned to digitize the label underneath it.

On a blistering August afternoon, Yusuke Kawai, 42, unpinned the metal netting and gathered the clams in his hands for inspection.

Vortices tend to stay pinned in this way, but sometimes they can unpin and migrate away from the object.

“The few people that were trapped, I believe, were probably unpinned,” Martin said.