Air pollution causes health problems and is attributable to some 50,000 annual deaths in the United States, but not all air pollutants pack the same punch. Scientists have tracked the scope of “PM 2.5 ...

Thousands of microplastics so small they can penetrate deep into the lungs are in the air you breathe in your home and car, a new study has found. The particles are likely the result of the ...

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

In a twist on conventional wisdom, researchers have discovered that in ocean-like fluids with changing density, tiny porous particles can sink faster than larger ones, thanks to how they absorb salt.

A new study has found nanoplastics in the edible part of vegetables for the first time, suggesting significant danger for ...