The inevitable has happened. Microplastics have already been found in birds and fish and whales, so it should have come as no surprise that they have now been discovered in humans. To be specific but indelicate, tiny plastic particles and fibers have been found in the stool of eight people who provided samples as part of a pilot study.

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“I’d say microplastics in poop are not surprising,” says Chelsea Rochman, an ecologist at the University of Toronto, who studies the effects of microplastics on fish. “For me, it shows we are eating our waste—mismanagement has come back to us on our dinner plates. And yes, we need to study how it may affect humans.”