a tsunami 5,500 years ago
... that mass graves in the Orkney and Shetland islands of Scotland might contain bodies from a tsunami 5,500 years ago?
... that mass graves in the <a href="./Orkney" id="mwAeQ" rel="mw:WikiLink" title="Orkney">Orkney</a> and <a href="./Shetland" id="mwAeU" rel="mw:WikiLink" title="Shetland">Shetland</a> islands of Scotland might contain bodies from <b id="mwAeY"><a href="./Garth_tsunami" id="mwAec" rel="mw:WikiLink" title="Garth tsunami">a tsunami 5,500<span id="mwAeg" typeof="mw:Entity"> </span>years ago</a></b>?