It's become common to read that microplastics—little bits of plastic, smaller than a pencil eraser—are turning up everywhere and in everything, including the ocean, farmland, food and human bodies.

“There’s a lot of meanings for ‘small,’” says Janet Conrad, a particle physicist at the Massachusetts Institute of Technology ...

Cosmic rays are particles from outer space that travel across the universe. They can be made by the sun, by other stars exploding, and even black holes. They move extremely fast, nearly the speed of ...

It's a disturbing thought: At this very moment, tiny crumbs of plastic are trickling through our bodies, a parade of unwelcome houseguests ready to take up residence in some tissue or organ. The ...

The biodegradable polymer Poly (D,L-lactide-co-glycolic acid) (PLGA) is widely regarded as safe for use in medical applications, seeing common use in the creation of particles used in in vivo studies.