regenerate the lens
... that in one study, a newt was able to regenerate the lens of its eye eighteen times?
... that in one study, a <a href="./Newt" id="mwC8E" rel="mw:WikiLink" title="Newt">newt</a> was able to <b id="mwC8I"><a href="./Lens_regeneration" id="mwC8M" rel="mw:WikiLink" title="Lens regeneration">regenerate the lens</a></b> of its eye eighteen times?