X-rays and their uses. X-rays are one type of electromagnetic radiation. They are commonly used in hospitals to produce photographs of bones which can be checked for breaks or fractures. X-rays have the following properties: they can penetrate less dense matter such as skin and body tissue (but not bone)
The historic Glensheen Mansion, along London Road in Duluth MN, was built for Chester Congdon and his family. Chester Congdon went from being a school teacher in Wisconsin to being the wealthiest Minnesotan at the time of his death in 1916, worth 40 million dollars.
This palatial mansion home, which boasts six waterfalls and more than a million pounds worth of gold leaf, could be the most expensive house ever sold in America. Due to be completed in 2016, the Chateau de Versailles in Florida's Hillsboro Mile is on the market at an incredible $159million (Â£105m).