softened
... that widespread permafrost explains why the whole landscape in the midlatitudes of Mars appears softened?
... that widespread <a href="./Permafrost" id="mwCxw" rel="mw:WikiLink" title="Permafrost">permafrost</a> explains why the whole landscape in the midlatitudes of <a href="./Mars" id="mwCx0" rel="mw:WikiLink" title="Mars">Mars</a> appears <b id="mwCx4"><a class="mw-redirect" href="./Terrain_softening_(Mars)" id="mwCx8" rel="mw:WikiLink" title="Terrain softening (Mars)">softened</a></b>?