According to Le Monde, temperature sensors at Paris Charles de Gaulle Airport in France recorded two brief spikes on April 6 and April 15, affecting the outcome of a Polymarket prediction market.
Le Monde reported that weather sensors at Paris Charles de Gaulle Airport in France showed anomalies on April 6 and April 15, when recorded temperatures briefly jumped by more than 3 degrees Celsius within minutes before falling back. The article links those irregular readings to the outcome of a Polymarket market tied to weather data. Polymarket is a crypto-based prediction market, where users trade on event outcomes using blockchain-based settlement. The episode adds to scrutiny around how external real-world data, often called an oracle input (external data fed on-chain), can affect resolution in blockchain-linked markets when source data appears abnormal.