Long after the planets of the Solar System formed, catastrophic collisions continued, with a climax about 4 billion years ago during an interval called the Late Heavy Bombardment. The scars of this geologic violence are evident today in the ancient cratered terrains of planetary surfaces. The interval of bombardment is thought to have shaped the terrestrial planets and moons, their atmospheres and possibly even the onset of life. In this web focus, we present research papers, overview articles and opinion pieces that discuss how large impacts influenced the evolution of the early Solar System.