A study conducted by researchers at the University of São Paulo (USP) in Brazil and reported in an article published in Nature Communications shows that the Cerrado, Brazil’s savanna biome, is experiencing the worst drought for at least 700 years. Here’s why. A study conducted by researchers at the University of São Paulo (USP) in Brazil and reported in an article published in Nature Communications shows that the Cerrado, Brazil’s savanna biome, is experiencing the worst drought for at least 700 years. Here’s why. Earth Sciences Environment Phys.org – latest science and technology news stories