MF Monitor: Last year was the warmest on record in California, its driest spell for more than 400 years but a new study says thats nothing compared to whats in store. In a paper, published by the journal Science Advances, researchers from Nasa and Columbia and Cornell universities warn that a vast swathe of the US, including the south-west states and the central plains, may face unprecedented drought conditions, unseen in the past 1,000 years. In about 35 years, the regions millennia-long natural cycle...