Scientists in the US have developed an AI machine to help humans search for ‘hidden life’ on Mars. The AI bot is far more effective at spotting biosignatures than humans, according to a new study from the SETI Institute. The deep learning tool was able to boost the probability of detecting these signs of life by up to 87.5%, making it nine times as effective as random searches. The AI was trained to detect biosignatures in Salar de Pajonales, a harsh Chilean environment.