To a set of (appropriately) atmospheric scenes of sunsets and swirls of wind, dry desert, ocean spray, scattered stars and volcanic clouds, Sayre briefly explains dust’s various terrestrial and cosmic origins, what’s in it and how it turns skies red at sunrise and sunset. Noting that, “dust that made King Tut sneeze is still on Earth. It might be on your floor. That dusty film on your computer screen might have muddied a dinosaur,” and closing with extended remarks on dust’s travels, ubiquity and longevity, the author will leave readers with a greater appreciation for the links between themselves, the stars and those bunnies under the bed. (Picture book/nonfiction. 6-8)