TESTOUR, Tunisia: Elias Chebbi inspected a beehive in a field in Tunisia, minutes after a buzz on his phone warned him of a potential problem. The 39-year-old beekeeper opened a flap in the hive to reveal a low-cost, locally made sensor dedicated to measuring key environmental variables.... An app on his phone then warns him if action needs to be taken.“ Thanks to this, I can relax, ” he said.... “ We are sorely in need of that in a world full of diseases and wars.” – AFP....