Eighteen <a href="https://en.wikipedia.org/wiki/Nobel_Prize" id="mwAQQ" rel="mw:WikiLink" title="Nobel Prize">Nobel laureates</a> sign the <a href="https://en.wikipedia.org/wiki/Mainau_Declaration" id="mwAQU" rel="mw:WikiLink" title="Mainau Declaration">Mainau Declaration</a> against <a href="https://en.wikipedia.org/wiki/Nuclear_weapon" id="mwAQY" rel="mw:WikiLink" title="Nuclear weapon">nuclear weapons</a>, later co-signed by thirty-four others.