Story : Tonight's documentary takes us to Africa, showing us that life in nature can be much more difficult than one might imagine. In this case, it is the lack of water that puts a natural environment in crisis, and the protagonists are hippos, who fight for life, searching, with exhausting marches, for the last puddles that allow them to survive. But this time, in addition to an exceptional drought, an even more insidious danger threatens their life: anthrax. Numerous and interesting reports: in the Roman Museum of Palazzo Massimo, the mummy of a girl from 200 AD is preserved, with the sarcophagus decorated and accompanied by many interesting objects that provide clues to her life, as Alberto Angela tells us. In Obama's America, a green new deal invests in energy saving, in the reduction of polluting emissions and in the production of renewable energy, to boost the economy and protect the environment.