<a href="https://en.wikipedia.org/wiki/Challenger_expedition" id="mwaw" rel="mw:WikiLink" title="Challenger expedition">Challenger expedition</a>: <a about="#mwt42" data-mw='{"parts":[{"template":{"target":{"wt":"HMS","href":"./Template:HMS"},"params":{"1":{"wt":"Challenger"},"2":{"wt":"1858"},"3":{"wt":"6"}},"i":0}}]}' href="https://en.wikipedia.org/wiki/HMS_Challenger_(1858)" id="mwbA" rel="mw:WikiLink" title="HMS Challenger (1858)" typeof="mw:Transclusion">HMS<span typeof="mw:Entity"> </span><i>Challenger</i></a>, commanded by Captain <a href="https://en.wikipedia.org/wiki/George_Nares" id="mwbQ" rel="mw:WikiLink" title="George Nares">George Nares</a>, sails from <a href="https://en.wikipedia.org/wiki/Portsmouth" id="mwbg" rel="mw:WikiLink" title="Portsmouth">Portsmouth, England</a>.