A NASA spacecraft has returned asteroid samples that hold not only the pristine building blocks for life but also the salty remains of an ancient water world.

This mineral-rich asteroid might have carried the seeds of life. Planetary scientists have discovered organic matter essential to life in dust and rock retrieved from an asteroid known as Bennu. The finding supports the theory that near-Earth asteroids,

Scientists from NASA and other institutions who have been analyzing the Bennu asteroid sample that returned to Earth last September found molecules, including amino acids, which are essential ingredients of life as we know it.