Comets and meteors have been raining debris on Earth for billions of years, and scientists think they just may be the vehicles that carried ... not at all rich in organic compounds.

Throughout Earth's history, the planet's surface has been regularly impacted by comets ... and organic molecules, but modern research indicates that they also created new substrates and compounds ...

We know that because spacecraft observing comets from afar helped us discover that they are primarily made of ice, but are also sprinkled with organic compounds - the building blocks of life as we ...