Theories of domestic catâs For decades, many theories have existed to explain the origin of cats. Traditionally, most scholars believed that all domestic cats had a common ancestor in ancient Egypt, where cats were domesticated around 3,600 years ago. Other researchers believed that domestic cats had more than one ancestor, the result of domestication occurring at different times and places, each resulting in a distinct ancestral breed 1.
Railroads usually consider a 100 ft. width of right of way centered about their main track centerline as the minimum on which they can effectively operate. Any encroachment within this limit, even if it is only for ditch cleanout or erosion control, is not welcomed by the railroad and therefore is to be avoided.
railroad siding, sidetrack, siding, turnout - a short stretch of railroad track used to store rolling stock or enable trains on the same line to pass standard gauge - railroad track having the standard width of 56.5 inches