Icon for the Sciences History Portal, from a drawing of Leonardo da Vinci
<ul><li><a href="//commons.wikimedia.org/wiki/File:Leonardo_da_Vinci_helicopter.jpg" title="File:Leonardo da Vinci helicopter.jpg">Leonardo da Vinci helicopter.jpg</a>: Leonardo da Vinci</li>
<li>derivative work: <a href="//commons.wikimedia.org/wiki/User:-Strogoff-" title="User:-Strogoff-"><i>Frédéric MICHEL</i></a></li></ul>
2009-08-24
<ul><li><a href="//commons.wikimedia.org/wiki/File:Leonardo_da_Vinci_helicopter.jpg" title="File:Leonardo da Vinci helicopter.jpg">Leonardo da Vinci helicopter.jpg</a></li></ul>