In popular science, dark matter is a hotly discussed topic. With various theories regarding its existence and interaction with regular matter, many scientists agree that these are some questions that remain unresolved. But thanks to work by scientists like Prof. Justin Khoury, physics and astronomy, University of Pennsylvania, significant steps to understanding this phenomenon are being made. As part of the Kieval lecture series, Khoury led a talk at Cornell on Monday, to discuss new approaches to solving these mysteries. There is significant evidence for the existence of dark matter.