Sinkhole urban areas due to water main breaks or sewer collapses when old pipes give way. They can also occur from the overpumping and extraction of groundwater and subsurface fluids. Sinkholes can also form when natural water-drainage patterns are changed and new water-diversion systems are developed. Some sinkholes form when the land surface is changed, such as when industrial and runoff-storage ponds are created; the substantial weight of the new material can trigger a collapse of the roof of an existing void or cavity in the subsurface, resulting in development of a sinkhole. Sinkholes tend to occur in karst landscapes. Karst
The Story of the Man Who Turned into a Dog of its surrounding countries, including Peru, Chile, Bolivia, and Uruguay. By 1956, the movement had died out, following the collapse of the Juan Perón political regime. The Story of the Man Who Turned into a Dog The Story of the Man Who Turned into a Dog (Historia del hombre que se convirtió en perro) is a short play written by Osvaldo Dragún as part of his "Historias para ser contadas" ("Stories to be Told"), a series of short plays. It is the third short play in the series. The original production premiered with the independent theatre group Teatro Popular Fray