On 27 August 1883, the island of Krakatoa let out a noise louder than any made on Earth since. It was heard 4800km away in the Indian Ocean island of Rodrigues, near Mauritius (“coming from the eastward, like the distant roar of heavy guns.”) Think, for a moment, just how crazy this is. What we’re talking about here is like being in Boston and clearly hearing a noise coming from Dublin, Ireland.