Scarification is the process of creating body art with scar tissue[?]. The scar tissue is usually created by burns, abrasions, or cuttings. The final result may resemble and inkless tattoo or an abstract design.
... the largest river in the world by volume, the Parana[?] with its impressive Iguaçu[?] falls, the Rio Negro, São Francisco[?], Xingu, Madeira and the Tapajós[?] ...