They’re the building rocks of life. Analysis of debris from the nearly 5 billion-year-old asteroid Bennu suggests the ingredients to life on Earth were present in the early days of our solar system, as detailed in a series of papers published in the journal Nature Astronomy.

When asteroids like Bennu hit the young Earth, they could have provided a complete package of complex molecules and the ingredients essential to life, such as water, phosphate and ammonia. Together, these components could have seeded Earth’s initially barren landscape to produce a habitable world.