On 12 July 1488, Korean official Choe Bu returned home after an extraordinary accidental journey across Ming Dynasty China, having documented everything he saw. His diary remains one of the most valuable accounts of fifteenth-century Chinese life ever written. Four centuries later, on the same date in 1562, Franciscan friar Diego de Landa presided over the burning of Maya codices in Yucatán, destroying centuries of astronomical and religious knowledge. Only four Maya manuscripts are known to have survived. In 1995, Chinese seismologists successfully predicted a major Myanmar-China border earthquake, saving hundreds of lives through timely evacuation. And in 1997, Berlin’s ninth Love Parade was met with a counter-protest called the Hateparade, organised by those who felt the techno scene had been commercialised beyond recognition. Four stories about what gets recorded, what gets destroyed, and what survives long enough to matter.