Microplastic sperules in tooth paste, about 30 µm in diameter. Credit: Dantor (talk) 20:55, 18 November 2013 (UTC), CC BY-SA 3.0 via Wikimedia Commons
Scientists have discovered microplastics in human blood for the first time, warning that the ubiquitous particles could also be making their way into organs.
The tiny pieces of mostly invisible plastic have already been found almost everywhere else on Earth, from the deepest oceans to the highest mountains as well as in the air, soil and food chain.