What lives off the Northwest coasts of Spain and shrinks to one-fifth of its size when alarmed? Enter the accordion worm.

That animal is a ribbon worm — and a newly discovered species. Researchers found the marine worm off Galicia, Spain, during scuba diving trips in the summer of 2021, according to a study published May ...

Horsehair worms, also called Gordian worms, develop in the bodies of grasshoppers, crickets, cockroaches and some beetle ...