NASA's OSIRIS-REx mission discovered molecules vital to life and a history of saltwater on asteroid Bennu. The findings suggest essential conditions for life were present across the early solar system,

Rock and dust samples from the Bennu asteroid contain molecules that are the "key to life" on Earth, NASA officials announced on Wednesday.

NASA's findings provide the strongest evidence yet that asteroids may have planted the seeds of life on Earth and that these ingredients were mingling with water almost right from the start.