Scientists from Louisiana and Michigan have wildly different predictions for the size of this year's 'dead zone' of low-oxygen water in the Gulf of Mexico.
Forecasts released Thursday say it will either be the smallest in nearly a quarter century at just under 1,200 square miles, or five times that big and a bit above average.
The forecasts are based on different hypotheses about how the system works.
via 2 Very Different Forecasts For Gulf 'Dead Zone' « CBS Dallas / Fort Worth.