Israeli archaeologists uncovered a network of medieval tunnels that once powered sugar mills during the Mamluk period, shedding new light on industrial innovation in the Holy Land, the Hebrew University of Jerusalem announced on Sunday.The tunnels, found beneath the pools of Gan Hashlosha National Park in the Beit She'an Valley, carved into soft tufa rock along Nahal Amal, appear to have supplied water to mills that processed sugarcane in the 14th and 15th centuries CE.The find was first made