<a href="https://en.wikipedia.org/wiki/Otto_Hahn" id="mw0A" rel="mw:WikiLink" title="Otto Hahn">Otto Hahn</a> discovers the <a href="https://en.wikipedia.org/wiki/Nuclear_fission" id="mw0Q" rel="mw:WikiLink" title="Nuclear fission">nuclear fission</a> of the heavy element uranium, the scientific and technological basis of <a href="https://en.wikipedia.org/wiki/Nuclear_power" id="mw0g" rel="mw:WikiLink" title="Nuclear power">nuclear energy</a>.