/oss/taxonomy/term/914/all en /oss/article/science-science-everywhere-you-asked/1920s-hair-removal-method-widely-advertised-absolutely-painless-and-needle-free-became-medical <p style="text-align:justify">In 1895 Wilhelm Roentgen made one of the most famous medical discoveries of all time when he noticed that a beam of electrons passing through a partially evacuated tube gave off invisible rays that caused fluorescent materials to glow. Intrigued by this observation he put his hand in front of a fluorescent screen and noted that an image of his bones formed. Apparently bones blocked the novel mysterious rays which were christened x-rays. It wasn’t long before physicians were using x-rays to peer into the human body. But they did note a side effect.</p> Tue, 05 Mar 2013 18:40:39 +0000 Joe Schwarcz PhD 1892 at /oss