These tiny shards have turned up everywhere from the depths of the ocean to the top of Mount Everest to the human body.

Microplastics are pervasive ocean pollutants, impacting ecosystems and human health. This article examines their lifecycle ...

Researchers say more than a fifth of the planet’s ocean — which makes up 70 percent of the surface of the Earth — has been subject to the darkening process over the course of the past two decades.