On 18 August 2019, around a hundred people gathered on a bare Icelandic mountainside to mourn Okjökull, the first glacier in Iceland to lose its official status. The ceremony included a plaque addressed to future generations, asking whether humanity acted on what it knew about climate change. The episode also explores three earlier events from the same date: Pierre Janssen’s 1868 discovery of helium in the sun’s spectrum during a solar eclipse in India, John White’s 1590 return to the deserted Roanoke Colony to find only the word ‘Croatoan’ carved into a post, and Antonio de Nebrija’s 1492 presentation of the first Spanish grammar to Queen Isabella, foreshadowing centuries of imperial expansion. Each story examines how humans mark loss, make accidental discoveries, confront unsolved mysteries, and codify power through language.
