Researchers do not know exactly what causes prostate cancer. But they have found some risk factors and are trying to learn just how these factors cause prostate cells to become cancer. On a basic level, prostate cancer is caused by changes in the DNA of a normal prostate cell. DNA is the chemical in our cells that makes up our genes. Our genes control how our cells function.
Barn definition, a building for storing hay, grain, etc., and often for housing livestock. See more.
A pole barn is a structure that's supported by poles set in the ground and anchored by concrete. Poles support the roof, and walls are optional. No foundation is required, and finished floors are also optional. Pole barns can be built to any size. The framing is horizontal to the posts, ensuring a sturdy and reliable structure. The posts and frame of pole barns are made of wood. Metal or wood siding can be used. Roofs typically are made from galvanized steel, although shinglesÂ­ also can be used [source: Burch].