The caatinga is a dry forest which ranges over about 845.000 square quilometers, accupying 11% of the Brazilian territory. Rainfall there may not reach 1.000 millimeters a year, and drought can last up to 11 months. To know more about the caatinga’s biodiversity and evolution, watch the video with samples of the talks during the 5th meeting of the Conference Cycle Biota-FAPESP Education on June 20th, in São Paulo. The Conference cycle is an initiative of the Biota-FAPESP Program, in partnership with Pesquisa FAPESP magazine.