Microplastics have been discovered in the human heart and its innermost tissues for the first time. While the health consequences of this are still unknown, the new study is yet another grim reminder of how pervasive the world’s plastic problem has become within just a century. In a new study, scientists at Beijing Anzhen Hospital in China collected cardiac tissue samples from 15 patients undergoing heart surgery, as well as well blood samples taken both pre- and post-operation. Advertisement Advertisement Using a number of different imaging techniques, the team "detected tens to thousands of individual microplastic pieces in most tissue…