What is gum? Most people have probably never considered this question, and might answer something like a chewy material you can put in your mouth. But, to a scientist they might answer something like nitrogen-rich polymeric sheets, because precisely defining the chemistry of a material is important to them. Or at least, thats what they called a type of organic material found in the sample collected of the asteroid Bennu by the OSIRIS-REx spacecraft. But more informally, scientists have taken to calling it space gum, and the process it formed under is making some of them question current models of asteroid formation.