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
A Horse Walks into a Bar A Horse Walks into a Bar A Horse Walks into a Bar () is a novel by Israeli author David Grossman. First published in Hebrew in 2014 by Ha'kibbutz Ha'meuchad as , the book was translated into English by Jessica Cohen, and published in the UK by Jonathan Cape in November 2016 and in the US by Alfred A. Knopf in February 2017. The title is derived from a common bar joke. Set in a stand-up comedy show in Israel that takes place over just two hours, the novel recounts the tale of a comic who faces a personal crisis