Shang dynasty diviners heated animal bones and tortoise shells until they cracked. The pattern of cracks answered questions posed by the king — about harvests, wars, weather. Each session was carved into the bone: the question, the diviner's interpretation, sometimes the outcome. Over 55,000 fragments survive from the dynasty's final two centuries, roughly 1250 to 1046 BC.
A team led by researchers publishing in Science Advances used these records as a climate dataset. Not by reading the answers — the crack interpretations are ambiguous and formulaic. Instead, they counted the questions. Specifically: how often did the kings ask about rain, floods, and water-related disasters? The frequency of weather-related divinations spiked in the dynasty's later period, correlating with paleoclimate evidence for intensified typhoon activity reaching inland China.
The diviners were trying to predict the future. Three thousand years later, the bones document the past. But the data isn't in the prophecies. It's in the anxiety. The frequency with which the king asked “Will there be flooding?” is itself a measurement of how often flooding had already disrupted life enough to generate the question. You don't consult the oracle about things that aren't worrying you.
Every archive contains a second archive: the record of what its authors chose to record. Library catalogs reveal not what was known but what was considered worth organizing. Court records reveal not what happened but what reached the threshold of official attention. The oracle bones are extreme because the first archive — the divination — is useless to us. The cracks say nothing. The questions say everything.
Worry is measurement. The act of asking is the data.