What was the largest volcanic eruption on Earth since the historic Mount Pinatubo eruption on 15 June 1991? Was the Toba supereruption 74,000 years ago—the largest in the past 100,000 years—responsible for a human genetic bottleneck or a 1000-year-long glacial advance? What role did small volcanic eruptions play in the reduced global warming of the past decade? What caused the Little Ice Age? Was the April 2010 Eyjafjallajökull eruption in Iceland important for climate change? What do volcanic eruptions teach us about new ideas on geoengineering and nuclear winter? These are some of the questions that have been answered since the review article by Robock . Reviews by Forster et al.  and Timmreck  go into some of these topics in much greater detail.