Despite only being around for the past century or so, plastics have become ubiquitous in modern life and for good reason: the final product is incredibly versatile. From grocery bags to IV bags to the teflon on non-stick pans, plastics really do make almost everything possible.
But, such a useful product comes at a cost. One of the chemicals used in making certain plastics, BPA, has been linked to a suite of ecological and human health problems. Now, scientists have discovered that the effects of BPA are so strong, certain species of fish lose their ability to tell their own species apart from another.