The research on microplastics in our bodies is terrifying. It might also be wrong.

This story originally appeared in The Guardian as an exclusive and is republished here as part of the Climate Desk collaboration.

High-profile studies reporting the presence of microplastics throughout the human body have been thrown into doubt by scientists who say the discoveries are probably the result of contamination and false positives. One chemist called the concerns “a bombshell.”

Studies claiming to have revealed micro and nanoplastics in the brain, testes, placentas...