tidal tails
... that roughly 1% of all star formation occurs within tidal tails?
... that roughly 1% of all <a href="./Star_formation" id="mwBv8" rel="mw:WikiLink" title="Star formation">star formation</a> occurs within <b id="mwBwA"><a href="./Tidal_tail" id="mwBwE" rel="mw:WikiLink" title="Tidal tail">tidal tails</a></b>?