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The world is covered with plastic pollution. That breaks down to become microplastics—tiny bits of plastic smaller than 5 mm. We know that it isn’t healthy to find these bits of plastic all over the planet (and in our bodies) but there isn’t much research on how this is going to affect mammals. A new study published this month in the International Journal of Molecular Science has tried to understand the long-term health impacts of this phenomenon and its findings are worrisome.

A new Chinese report describes doctors finding microplastics in heart tissue both before and after heart surgery.

A new study raises questions about the quantity of plastic in the ocean, but the threat itself is clear

There is less plastic littering the ocean than scientists previously thought, but what is there could persist for a long time, a new study said Monday.The preponderance of larger floating pieces suggests that the total amount of plastic in the ocean is "much lower" than previously thought, according to the study published in the journal Nature Geoscience.

A study of 38 lakes and reservoirs in 23 countries found that Lake Tahoe had the third-highest concentration of microplastics.