One of the key components for the evolution of life as we know it is the presence of “volatiles”: elements and compounds that can be vaporized easily at relatively low temperatures. This means that understanding where these volatiles came from, and whether Earth is unusually rich in them, is critical to understanding what makes life possible—and a new study, published October 11 in Science Advances, suggests that most originate in a relatively small proportion of the material from which the p...