Asteroid sample nails meteorite source

Dust shows where most space rocks come from

Scientists have scraped the heavens and seen the solar system in a speck of dust.

DUST IN THE WIND Dust recovered from the asteroid Itokawa, pictured here, holds clues to the early solar system and a record of the space rock’s life.

Well, more than 1,500 specks, most less than 50 millionths of a meter in diameter.