Leonardo De Vinci was fascinated by flight and dreamed of various flying machines. He was realistic enough, though, to consider the risks and thought that brave men who strapped on wings should...
The April 1907 issue of American Medicine featured a paper by Dr. Duncan Macdougall describing his experiment whereby the beds of dying patients were placed on a sensitive balance. Believe it or...
If you have ever taken a good look at the back of a tube of toothpaste during those long two minutes of recommended brushing time, you may have noticed sodium laureth sulfate (SLES) and sodium...
