While experimenting with electricity, <a href="https://en.wikipedia.org/wiki/Wilhelm_Röntgen" id="mweA" rel="mw:WikiLink" title="Wilhelm Röntgen">Wilhelm Röntgen</a> discovers the <a href="https://en.wikipedia.org/wiki/X-ray" id="mweQ" rel="mw:WikiLink" title="X-ray">X-ray</a>.