In the last two decades, planetary scientists discovered that Pluto has many siblings and that they are all part of a super-sized version of the asteroid belt—known as the Kuiper Belt—in the vast space beyond the zone of the giant planets. The New Horizons spacecraft is visiting Pluto in July and will subsequently visit another Kuiper Belt Object “PT1” (for Potentially Targetable KBO 1), giving us the first close-up look at these worlds in the coldest, darkest regions of the solar system. Professor Malhotra will review the recent discoveries and how they are revolutionizing our knowledge of the solar system.