Microplastics is almost everywhere. It whizzes through the air, swims through oceans and has even been detected in the snow of the Arctic, far away from human civilization. It has now been known for some time that the tiny particles can enter the human body. Whether they are harmful to health is controversial. A new study now suggests exactly that. Researchers from Italy discovered the finest plastic particles in vascular deposits that they had surgically removed from patients. The worrying thing: Patients with microplastics in the deposits had a higher risk of dying in the years that followed than patients in whom the scientists could not detect any of these particles.