Get the latest Science News and Discoveries

Black Friday air purifier deal: Save 26% on the Blueair Pure 211+


None

Get the Android app

Or read this on Live Science

Read more on:

Photo of Black

Black

Photo of Air

Air

Photo of Black Friday

Black Friday

Related news:

News photo

Black lava from this bizarre volcano could reveal Earth's deep secrets

News photo

Samyang's 14mm F2.8 wide angle, autofocus lenses are at their lowest price ever this Black Friday

News photo

What is a black hole?